unneighbourly vs unpropitious

unneighbourly

adj

  • Not neighbourly; antisocial. 

adv

  • In a way that is not neighbourly. 

unpropitious

adj

  • not propitious; unfavourable, untimely 

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