When I did my PhD in mathematics, I would proofread my papers maybe 10 times before submission. Moving into computer science has changed my attitude, since reviewers frequently ask for major revisions (regardless of how careful I am). Now also pragmatic matters (e.g. not having enough time before conference deadlines) enters into things.
I'm fairly sure 0 is not an appropriate number of times to proofread one's paper, but I'm not sure how many times suffices. I don't know what is "normal" when it comes to the number of times one should proofread their paper.
Question: How many times should one proofread their paper before submission?