decrease vs disimprovement

decrease

noun
  • An amount by which a quantity is decreased. 

  • A reduction in the number of stitches, usually accomplished by suspending the stitch to be decreased from another existing stitch or by knitting it together with another stitch. See Decrease (knitting). 

verb
  • Of a quantity, to become smaller. 

  • To make (a quantity) smaller. 

disimprovement

noun
  • Reduction from a better to a worse state. 

  • attempt to make something better while ending up worse than before. 

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