accroach vs arrogate

accroach

verb
  • To hook, or draw to oneself as with a hook. 

  • To usurp, as jurisdiction or royal prerogatives. 

  • To encroach. 

arrogate

verb
  • To appropriate or lay claim to something for oneself without right. 

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