cyst vs sachet

cyst

noun
  • A pouch or sac without opening, usually membranous and containing morbid matter, which develops in one of the natural cavities or in the substance of an organ. 

  • Of or pertaining to the urinary bladder or gall bladder (in compounds). 

sachet

noun
  • A small, sealed packet containing a single-use quantity of any material. 

  • A cheesecloth bag of herbs and/or spices added during cooking and then removed before serving. 

  • A small scented cloth bag filled with fragrant material such as herbs or potpourri. 

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