The trucks gain/gather 'speed' as they drive down the hill. = The trucks pick up 'speed' as they drive down the hill. [=the trucks go faster as they drive down the hill]
He types at a 'speed' of about 50 words per minute. = His typing 'speed' is about 50 words per minute.
Let me 'bring you up to speed' on our plans. [=let me tell you about the changes in our plans]
(..) We let Madison have it. I have taught you a thing or two. Well, I see that you're up to speed. Well, as am I. Um... I noticed there were some employee issues at the tabloid. You know, contracts about to expire. So, I just want (..)2011 TvShow: Suits Title: Rules of the Game Season: 1 Episode 11