"Catch you later" - This phrase is primarily used when saying good bye to someone who you expect to see later. There is no specific time frame for when you will see them again.

There are so many good expressions! My favourite one is "Bear with me". It is a request for patience. For example, you are talking to someone in English and need a moment to find a certain word in a dictionary, you can say: "Please, bear with me!". The important part comes when you use this expression in a written form. Many people make a mistake of writing "Bare with me", which would be an invitation to undress. Have fun learning English expressions!