assignment vs stand in

assignment

noun
  • A transfer of a right or benefit from one person to another. 

  • A document that effects this transfer. 

  • The act of assigning; the allocation of a job or a set of tasks. 

  • An assigned task. 

  • The categorization of persons as belonging to the male or female sex. 

  • An operation that assigns a value to a variable. 

  • A position to which someone is assigned. 

  • A task given to students, such as homework or coursework. 

  • The categorization of something as belonging to a specific category. 

stand in

noun
  • A substitute; a replacement. 

verb
  • To substitute for; to replace; (theater) to serve as an understudy. 

  • To make one of a party in a bet or other speculation. 

  • To take a side in a dispute. 

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