'Quite' (adverb) has two meanings:
1. To the utmost or most absolute extent or degree, eg. absolutely/ completely
2. To a certain or fairly significant extent or degree, eg. fairly
In this case, a native speaker would interpret the meaning as 'fairly common'. You could also say 'fairly, somewhat, pretty...' as synonyms.
*One small correction to your question:
- 2 meanings (plural, with an 's')