Which one is correct?
"history of symptoms for the past 5 days" or "history of symptoms since 5 days"?

Some examples from the web:

• You've had a memory of me, of what you did, for the past 5 years.
• Could the Commission please provide a breakdown of funding for tobacco subsidies, Member State by Member State, for the past 5 years.
• I haven't seen any patients express any symptoms for the past few days now.
• She's the most successful president in the history of our network and for the past five years has kept us at the very top of the ratings.
• So does the history of the world for the past 20 years.
• So, the 3.2 billion base pairs inside each of your cells is really a history of where you've been for the past billion years.
• If your allergic rhinitis is intermittent (presence of symptoms for less than 4 days per week or for less than 4 weeks), your physician will recommend you a treatment schedule that will depend on the evaluation of the history of your disease.
• I've listened to his voice for the past four years.
• Real close for the past year.
• Had been running almost every night for the past few months.
• Either way, I'm done punishing you for the past.
• He's been catatonic for the past four years.
• He and Gradenko have been communicating for the past four days.
• Now... that's the list of visitors for the past 12 months.
• The deceased Kevin Carpenter has been travelling for the past three years.
• I've been waiting for the past 40 years.
• You wanted to help your people and make amends for the past.
• Dean has been The Grinder for the past eight years.
• She's worked at Gamma Grade for the past two months.
• Weiss brought his niece here for the past two days.

Some examples from the web:

• No, I haven't seen anyone tatooed, since 5 days ago until now you guys.
• A history of symptoms compatible with those of the earlier stages of syphilis within the previous 12 months
• If your allergic rhinitis is intermittent (presence of symptoms for less than 4 days per week or for less than 4 weeks), your physician will recommend you a treatment schedule that will depend on the evaluation of the history of your disease.
• She's had zero symptoms since she got here.
• That you've had symptoms since your first daughter was born.
• We should find out if he's had any symptoms since he left the Navy.
• The incubation period is 3-5 days.
• My wisdom teeth were extracted 5 days...
• Have you noticed any unusual symptoms since the probe?
• Most patients had relief of symptoms after stopping treatment.
• The infusion rate may be increased upon improvement of symptoms.
• Hypersensitivity reactions are characterised by the appearance of symptoms indicating multi-organ system involvement.
• Description of symptoms is provided in section II.1.
• For description of symptoms see Section II.1.
• News vans have been parked since 5:00.
• You've been working me since 5 A.M.
• I've been awake since 5:00.
• He's been here since 5 a.m. walking the track.
• Since 5:30 this morning with my daughter...
• Cyprus has participated in ERM II since 5 May 2005.