This is the 510th most frequent Russian word.
помимо
"Помимо" means "besides" or "apart from."
The word 'помимо' indicates exclusion or separation, specifying that people other than 'нас' were present.
Помимо нас там было ещё несколько людей.
Apart from us, there were a few other people there.
The word 'помимо' shows other interests that are additional to, or excluding, 'музыки'.
Он интересуется многими вещами, помимо музыки.
He is interested in many things other than music.
The word 'помимо' is used to indicate an additional activity besides the mentioned one, 'работы'.