(do something) for an hour or so

This is an expression for talking about time loosely. "The next week or so" means "about the next week". It could be in 5 days, in 10 days, etc.:

Think it over and let me know in the next week or so.

Here's an example from the "Questions" page on this site:

This is an example of hiphop slang from the past 15 years or so.

This phrase appears in these lessons: