grapefruit vs lemon

grapefruit

noun
  • The tree of the species Citrus paradisi, a hybrid of pomelo (Citrus maxima) and sweet orange. 

  • The large spherical tart fruit produced by this tree. 

lemon

noun
  • A semitropical evergreen tree, Citrus limon, that bears such fruits. 

  • A more or less bright shade of yellow associated with lemon fruits. 

  • A defective or inadequate item or individual. 

  • A yellowish citrus fruit. 

  • Favor. 

  • A piece of fanfiction involving explicit sex. 

adj
  • Containing or having the flavour/flavor and/or scent of lemons. 

  • Of the pale yellow colour/color of lemons. 

  • Smart; cheeky, vocal. 

verb
  • To flavour with lemon. 

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