acne vulgaris vs freckle

acne vulgaris

noun
  • An inflammatory disease of the skin, caused by changes in the pilosebaceous units. 

freckle

noun
  • A small brownish or reddish pigmentation spot on the surface of the skin. 

  • A small sweet consisting of a flattish mound of chocolate covered in hundreds and thousands. 

  • The anus. 

  • Any small spot or discoloration. 

verb
  • To become covered with freckles. 

  • To cover with freckles. 

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