bleh vs yech

bleh

intj
  • An expression of mild disgust, possible imitative of vomiting 

  • Used to reflect general indifference to a situation or topic. 

adj
  • Mildly uncomfortable; not good. 

yech

intj
  • An exclamation of disgust. 

noun
  • An exclamation of disgust. 

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