make too many demands on vs overburden

make too many demands on

overburden

noun

  • A sterile stratum that lies above the stratum being investigated 

  • The rock and subsoil that lies above a mineral deposit such as a coal seam. 

verb

  • To overload or overtax. 

How often have the words make too many demands on and overburden occurred in a corpus of books? (source: Google Ngram Viewer )