hard as nails vs unneighbourly

hard as nails

adj

  • Very unsympathetic; callous 

  • Able to endure difficulties; tough 

unneighbourly

adj

  • Not neighbourly; antisocial. 

adv

  • In a way that is not neighbourly. 

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