frond vs leaflet

frond

noun
  • The leaf of a fern, especially a compound leaf. 

  • Any fern-like leaf or other object resembling a fern leaf. 

leaflet

noun
  • One of the components of a compound leaf. 

  • A small sheet of paper containing information, used for dissemination of said information, often an advertisement. 

  • A flap of a valve of a heart or blood vessel. 

  • A small plant leaf. 

verb
  • To distribute leaflets to. 

  • To distribute leaflets. 

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