nonplussed vs unneighbourly

nonplussed

adj
  • Unaffected, unfazed; unimpressed. 

  • Unsure how to act or respond; bewildered, perplexed. 

unneighbourly

adj
  • Not neighbourly; antisocial. 

adv
  • In a way that is not neighbourly. 

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