feel-good vs unconcerned

feel-good

adj
  • Creating a feeling of happiness. 

unconcerned

adj
  • Not anxious, apprehensive, or worried. 

  • Having no involvement. 

  • Indifferent and having no interest; aloof. 

How often have the words feel-good and unconcerned occurred in a corpus of books? (source: Google Ngram Viewer )