disconcert vs pull the rug (out) from under

disconcert

verb

  • To bring into confusion. 

  • To frustrate, discomfit. 

  • To upset the composure of. 

noun

  • A state of disunion. 

pull the rug (out) from under

How often have the words disconcert and pull the rug (out) from under occurred in a corpus of books? (source: Google Ngram Viewer )