Looking on the internet deeply has found these results:

in this weekend is the most popular phrase on the web.

over this weekend 1987,000 results on the web	in this weekend 147,200,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Well fine, why don't you come over this weekend. Did you see the coverage the fetal alcohol people got themselves over this weekend? "I'm going 2 tell Sadie it's over this weekend." Gracie's coming over this weekend, right? We really should let her know that we're all coming over this weekend for Rocco's birthday. But you knew she was stopping over this weekend, right? However, the schedule for monetary union also envisages two further resolutions being adopted over this weekend. Did Sam call to tell you he won't be over this weekend?	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

over this weekend

1987,000 results on the web

in this weekend

147,200,000 results on the web

More popular!

Well fine, why don't you come over this weekend.
Did you see the coverage the fetal alcohol people got themselves over this weekend?
"I'm going 2 tell Sadie it's over this weekend."
Gracie's coming over this weekend, right?
We really should let her know that we're all coming over this weekend for Rocco's birthday.
But you knew she was stopping over this weekend, right?
However, the schedule for monetary union also envisages two further resolutions being adopted over this weekend.
Did Sam call to tell you he won't be over this weekend?

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.