The term 'not always' can be expressed in two different ways: 'SOMETIMES' and 'attimes'. The word 'SOMETIMES' has nine letters and is used to describe something that does not happen all the time, but may occur at irregular intervals. The word 'attimes' has seven letters and is used to describe something that is not always the case, but may occur occasionally. Both words are used to express the idea that something does not happen all the time.