behalf vs stead

behalf

noun
  • One's role or rightful place; stead or authority. 

  • The interest, benefit, or wellbeing of someone or something. 

stead

noun
  • The position or function (of someone or something), as taken on by a successor. 

  • An emotional or circumstantial "place" having specified advantages, qualities etc. (now only in phrases). 

  • One's partner in a romantic relationship. 

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