From Longman Dictionary of Contemporary Englishstock of jokes/knowledge/courage etcstock of jokes/knowledge/courage etcAMOUNTthe jokes, knowledge etc that someone knows or has John seems to have an inexhaustible stock of funny stories. → stock
Examples from the Corpus
stock of jokes/knowledge/courage etc• This ties in with the notion of the negotiable nature of people's stocks of knowledge.• These stocks of knowledge can be altered by interactions, through negotiation. 