secretor vs tonsil

secretor

noun
  • A cell, tissue, or organ (such as a gland) that produces a bodily secretion. 

  • A person who secretes comparatively large quantities of blood-group antigens in their bodily fluids. 

  • A person who or animal that secretes (emits a bodily fluid). 

tonsil

noun
  • Any of various small masses of lymphoid tissues. 

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