an army vs plenty

an army

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 an army and plenty occurred in a corpus of books? (source: Google Ngram Viewer )