ail vs pine tree

ail

noun
  • The awn of barley or other types of corn. 

verb
  • To be ill; to suffer; to be troubled. 

  • To cause to suffer; to trouble, afflict. (Now chiefly in interrogative or indefinite constructions.) 

pine tree

noun
  • Any coniferous tree in the genus Pinus 

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