express sympathy to vs fortify

express sympathy to

fortify

verb
  • To increase the nutritional value of food by adding ingredients. 

  • To impart strength or vigor to. 

  • To increase the defenses of; to strengthen and secure by military works; to render defensible against an attack by hostile forces. 

  • To add spirits to wine to increase the alcohol content. 

How often have the words express sympathy to and fortify occurred in a corpus of books? (source: Google Ngram Viewer )