balsamic vs softening

balsamic

noun
  • A balsamic vinegar. 

adj
  • Producing balsam. 

  • Having the health-giving properties of balsam; soothing, restorative. 

  • Having the pleasant odour of balsam; balmy, fragrant. 

softening

noun
  • The process of making something soft. 

  • The process of becoming soft. 

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