day vs due date

day

noun
  • Any period of 24 hours. 

  • Rotational period of a planet (especially Earth). 

  • The part of a day period which one spends at one’s job, school, etc. 

  • A period from midnight to the following midnight. 

  • A period of contention of a day or less. 

  • A 24-hour period beginning at 6am or sunrise. 

  • A specified time or period; time, considered with reference to the existence or prominence of a person or thing; age; time. 

  • Part of a day period between sunrise and sunset where one enjoys daylight; daytime. 

verb
  • To spend a day (in a place). 

due date

noun
  • The date by which a task is supposed to be completed. 

  • The date on which a pregnant woman is expected to give birth. 

  • The date by which a book (or other item) borrowed from a library must be returned. 

  • The date of payment in financial arrangements. 

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