a couple of month vs a couple of months

Some examples from the web:

• September 16 ·. Germanize yourself! A couple of month ago, we provided you with ten steps to germanize yourself, now we got 21 for you smile emoticon.
• Gyms and Workout Facilities: Would continous rope jumping as exercise for a couple of month lead to back pain or weakening of back muscles? Gyms and ...
• Save for a couple of month and you have earned yourself a Goa trip (I travelled 4 times in a year). So be ready with your waterproof shoes and raincoats and ...
• long beach, ca | aug 15th |. A couple of month ago I snapped a few photos while hanging out with the folk over at Snake Oil Provisions in Long Beach. Pictured is  ...

Some examples from the web:

• If you behave you can go home after a couple of months.
• We're expecting our second in a couple of months.
• She was transferred to another facility a couple of months back.
• Wear this for a couple of months.
• So he crashed his car a couple of months back.
• You know, it's been a couple of months...
• Moving to London in a couple of months.
• Mexico might not be bad for a couple of months.
• After a couple of months, he had to replace you.
• Been around a couple of months.
• We plan to be married in a couple of months.
• It's been a couple of months.
• So I left them for a couple of months.
• Only a couple of months, Owen.
• At least enough to keep them busy for a couple of months.
• She spent a couple of months there in 1997.
• I got your flowers a couple of months later.
• We keep them a couple of months, filed chronologically.
• Be ready in a couple of months.
• It's the second suicide in a couple of months.