lethargic vs unneighbourly

lethargic

adj

  • indifferent, apathetic 

  • sluggish, slow 

unneighbourly

adj

  • Not neighbourly; antisocial. 

adv

  • In a way that is not neighbourly. 

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