account for vs run up

account for

verb
  • To constitute in amount or portion. 

  • To destroy or put out of action. 

  • To make or render a reckoning of funds, persons, or things. 

  • To be answerable for. 

  • To be the primary cause of 

  • To explain by relating circumstances; to show that some one, thing or members of a group are present or have been processed. 

run up

verb
  • To accumulate (a debt). 

  • To approach (an event or point in time). 

  • To thrust up, as anything long and slender. 

  • To make something, usually an item of clothing, very quickly. 

  • To take to a destination or before an authority. 

  • Used other than figuratively or idiomatically: see run, up. 

  • To rise; to swell; to grow; to increase. 

  • Of a bowler, to run, or walk up to the bowling crease in order to bowl a ball. 

  • To bring (a flag) to the top of its flag pole. 

  • To run (towards someone or something); to hasten to a destination. 

  • To erect hastily, as a building. 

  • To string up; to hang. 

How often have the words account for and run up occurred in a corpus of books? (source: Google Ngram Viewer )