a crowd vs plenty

a crowd

plenty

adv

  • More than sufficiently. 

  • Used as an intensifier, very. 

noun

  • A more-than-adequate amount. 

pron

  • More than enough. 

det

  • much, enough 

  • many 

How often have the words a crowd and plenty occurred in a corpus of books? (source: Google Ngram Viewer )