drag up vs sow

drag up

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

  • To educate reluctant pupils. 

  • To remind people of something, usually unpleasant, from the past. 

sow

verb
  • To scatter over; to besprinkle. 

  • To scatter, disperse, or plant (seeds). 

  • To spread abroad; to propagate. 

noun
  • A mass of metal solidified in a mold. 

  • A sowbug. 

  • A female bear, she-bear. 

  • A contemptible, often fat woman. 

  • A female guinea pig. 

  • A channel that conducts molten metal to molds. 

  • A kind of covered shed, formerly used by besiegers in filling up and passing the ditch of a besieged place, sapping and mining the wall, etc. 

  • A female pig. 

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