affectionate vs lovebird

affectionate

verb
  • To show affection to; to have affection for. 

adj
  • Characterised by or proceeding from affection; indicating love; tender. 

  • Having affection or warm regard; loving; fond. 

lovebird

verb
  • To express romantic affection openly. 

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. 

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