administer vs assign

administer

verb
  • To manage or supervise the conduct, performance or execution of; to govern or regulate the parameters for the conduct, performance or execution of; to work in an administrative capacity. 

  • To give, as an oath. 

  • To apportion out, distribute. 

  • To minister (to). 

  • To settle, as the estate of one who dies without a will, or whose will fails of an executor. 

  • (medicine) To give (a drug, to a patient), be it orally or by any other means. 

  • (medicine) To cause (a patient, human or animal) to ingest (a drug), either by openly offering or through deceit. 

assign

verb
  • To appoint or select (someone) for some office. 

  • To give (a value) to a variable. 

  • To allot or give (something) as a task. 

  • To designate or set apart (something) for some purpose. 

  • To attribute or sort (something) into categories. 

  • To categorize (someone) as belonging to the male or female sex. 

  • To transfer (property, a legal right, etc.) from one person to another. 

noun
  • An assignee. 

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