If a person said they had "a number of choices", it would mean more than a few (3-4) choices and less than "many". There are no hard-fast rules, but this is how I would interpret what might be said. If my friend says, "I have had a FEW job offers". I would say, "That's good". If my friend says," I've had A NUMBER of job offers". I would say, "That's really good" If my friend says, "I've had MANY jobs offers. I would say, "That's fantastic!". Hope this helps

'a number of ' means a quantity of. If I used it it would usually mean 'a few'. I could also use it n a sarcastic tone of voice. Then it would usually refer to 'a lot of'.

It could mean either, used when someone doesn't know exactly the number of times or exactly when.

Yea "you've done this lots of times" "you've done this multiple times " "you've done this a couple of times" "you've done a number of times"

I think it is when to refer to an amount