forth year vs fourth year

Some examples from the web:

• You and Anne have been going back and forth for years.
• My online friends and I have traded them back and forth for years.
• From these yards, 40 to 50 sailing ships set forth each year to plough the high seas.
• You've both been bouncing back and forth for years now and I don't think you've spent enough time together to decide if you should be together the rest of your lives.
• As a result of the unequal distribution of responsibility, Member States have been in an argument about who is responsible and complaints have been flying back and forth for years now, with the unfortunate refugees trapped in the middle.
• Then as the spring of this year brought forth plum blossoms...
• Grapes used for production were from the first harvest of a vineyard. The first harvest is to be the one from the third year, forth at latest, after planting.
• Been dealt back and forth on the black market for years.
• In recent years someone from Europe has sent a machine copy - with the letterhead and so forth, without identifying himself.
• Four score and seven years ago our fathers brought forth on this continent a new nation, conceived in liberty and dedicated to the proposition that all men are created equal.
• He said she spent most of the past year traveling back and forth from Albania.
• For this 102-year-old karate master, his ikigai was carrying forth this martial art.
• In this context, it has put forth a preliminary target of cutting its use of rare earths by one-third in the upcoming years.
• It was just a few years after the novel was published that the plays started coming forth.
• Let me take you back, back millions of years ago, when the Earth spewed forth many different species from its molten loins.
• There are many tragic examples of cases where asylum seekers wait for years to get their applications processed, or are sent back and forth between different European countries because no-one wants to accept responsibility.
• - Yeah. Dozens of them, filed back and forth between all the Nicks over the years.
• I am vomiting forth the marginalia, the clutter that this house has accumulated over the years, to make things more comfortable for ray.
• Fourscore and seven years ago, our forefathers brought forth upon...
• Four score and seven years ago our fathers brought forth a new nation dedicated to the proposition that all men are created equal.

Some examples from the web:

• Chris is a fourth year at the Cleveland clinic.
• I'm only a fourth year.
• In entertainment news, Galaxy Broadcasting president James Olsen assured viewers that the television writers' strike, now in its fourth year will not affect programming.
• Joseph Puissoneau, fourth year, B2.
• He did his fourth year from the hospital.
• I finished fourth year on faculty and I am not silent.
• Set them on fire in my fourth year.
• Other sales are stationary for the fourth year in a row.
• And this will be our fourth year in a row.
• This is the fourth year in which the Commission has refused to accredit the Bucharest institution.
• Eurojust has adopted appropriate measures to replace framework contracts within their fourth year of duration at the latest.
• I am pleased to report we are, for the fourth year in a row, the largest privately held corporation of its kind in North America.
• Over the past month, the fourth year associates have called our top clients.
• And, for the fourth year running, it's Robert.
• The growth rate stabilised at around 4.7 cm per year from the fourth year of treatment.
• From the fourth year Turkey has to bear the full cost of its financial contribution, i.e. EUR 3127000.
• If this amount is exceeded for three consecutive years this Directive shall apply with effect from the fourth year.
• In the fourth year of operation of the Programme the Commission shall evaluate the progress made in its implementation together with associated environmental trends and prospects.
• The fourth year, we were just short of 100.
• If the amount set out in paragraph 1 is exceeded for three consecutive years this Directive shall apply from the fourth year.