tardy vs unsharp

tardy

adj
  • Ineffectual; slow-witted, slow to act, or dull. 

  • Late; overdue or delayed. 

  • Moving with a slow pace or motion; not swift. 

noun
  • A piece of paper given to students who are late to class. 

  • An instance of a student's being marked as tardy by a teacher on the teacher's attendance sheet. 

unsharp

adj
  • dulled or intentionally blunt. 

  • out of focus; blurry. 

verb
  • To sharpen (an image) by creating a blurred ("unsharp") negative as a mask, and then combining that mask with the original. 

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