encroachment vs lawfulness

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. 

lawfulness

noun
  • Property of being lawful, of obeying the law. 

  • Property of operating in a manner organized by certain laws. 

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