encroachment vs transgression

encroachment

noun
  • An intrusion upon another's possessions or rights; infringement. 

  • That which is gained by such unlawful intrusion. 

  • An unlawful diminution of the possessions of another. 

  • An entry into a place or area that was previously uncommon; an advance beyond former borders; intrusion; incursion. 

transgression

noun
  • A violation of a law, duty or commandment. 

  • An act that goes beyond generally accepted boundaries. 

  • A relative rise in sea level resulting in deposition of marine strata over terrestrial strata. 

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