analytical vs perfunctory

analytical

adj
  • Using analytic reasoning as opposed to synthetic. 

  • Of or pertaining to analysis; resolving into elements or constituent parts 

perfunctory

adj
  • Performed in a careless or indifferent manner as a thing of rote. 

  • Done only or merely to conform to a minimal standard or to fulfill a protocol or presumptive duty. 

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