indenture vs strike a bargain

indenture

verb
  • To bind a person under such a contract. 

  • To indent; to make hollows, notches, or wrinkles in; to furrow. 

noun
  • A contract which binds a person to work for another, under specified conditions, for a specified time (often as an apprentice). 

  • An indentation; a recess. 

  • A document, written as duplicates separated by indentations, specifying such a contract. 

strike a bargain

verb
  • To enter into a bargain; to agree upon the conditions of a sale or other transaction. 

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