oversight vs unconcern

oversight

noun
  • An omission; something that is left out, missed or forgotten. 

  • Supervision or management. 

  • Overview. 

verb
  • To suppress content in a way that removes or minimizes its visibility or viewability. 

  • To oversee; to supervise. 

unconcern

noun
  • Lack of interest or care; indifference or apathy. 

  • Freedom from worry or apprehensiveness; insouciance or nonchalance. 

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