The frequency of an occurrence; how often something occurs or happens. Sometimes wrongly used as "oftenness".

This is not the most mispronounced word in the English language as someone defined it. According to Longman Pronunciation Dictionary, the word "often" can be pronounced with the "t" (like off-ten) or without the "t" (oh-ffen).

Many speakers use both the form without t and the form with it. Preference polls. Br. no t 73%, with t 27%. American English, no t 78%, with 22 %. (Longman Pronunciation Dictionary).

This is one of the most mispronounced words in the English Language. It should rhyme with "coffin". It isn't "off-ten".

A frequent basis.

Means that something happens quite often.

If you do something once too often it means that you have repeated an action which is bad, stupid or dangerous with an unpleasant end result. So you end up looking a complete wanker, in A & E with serious injuries or someone is totally pissed off with you to an extent which is going to be detrimental to your health and wellbeing.

Aside from being the most cliched pick-up line, this phrased is used can be used in other social situations.

1. What you say when you are in a group conversation and everyone randomly stops talking.

2. What you say when you first arrive somewhere after your friends have been there longer.