blemish vs deficiency

blemish

noun
  • A moral defect; a character flaw. 

  • A small flaw which spoils the appearance of something, a stain, a spot. 

verb
  • To tarnish (reputation, character, etc.); to defame. 

  • To spoil the appearance of. 

deficiency

noun
  • Inadequacy or incompleteness. 

  • An insufficiency, especially of something essential to health. 

  • The codimension of a linear system in the corresponding complete linear system. 

  • The amount by which the number of double points on a curve is short of the maximum for curves of the same degree. 

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