furtherance vs stead

furtherance

noun
  • The act of furthering or helping forward 

  • Promotion. 

  • Advancement or progress. 

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 furtherance and stead occurred in a corpus of books? (source: Google Ngram Viewer )