foe vs lovebird

foe

noun
  • An enemy. 

  • A unit of energy equal to 10⁴⁴ joules. 

lovebird

noun
  • Any small parrot from one of the nine species within the genus Agapornis. Sometimes they are kept as cage birds and are noted for their affection towards each other. 

  • One of the members of an openly affectionate couple. 

verb
  • To express romantic affection openly. 

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