What is a small bit?
In this regard, what is a tiny bit?
(physics and chemistry) the smallest component of an element having the chemical properties of the element. (nontechnical usage) a tiny piece of anything.
Likewise, what is the difference between a bit and a little? There is no difference in meaning between these three sentences, unless the speaker already establishes a context. This means he is somewhat angry. When used alone, "little", "bit", and "little bit" all mean "small". But if you emphasize "little bit" over "little" or "bit" then you are emphasizing how small it is.
Simply so, what is a synonym for small bits?
A very small quantity or amount. smidgen. ace. bit. crumb.
How long is in a little bit?
The “bit” you refer to is an extremely elastic piece of time. Without context, it generally means a short time interval- less than an hour up to a few hours. If said to someone who you see on a less frequent basis (perhaps weekly) it could cover one or two weeks. Context allows it to stretch quite a long way.