arrowroot vs sago

arrowroot

noun
  • A starchy substance obtained from the rhizomes of an arrowroot plant used as a thickener. 

  • Maranta arundinacea from the Marantaceae family, a large perennial herb native to the Caribbean area with green leaves about 15 centimeters long. 

  • Usually preceded by an attributive word: some other plant whose rhizomes are used to prepare a substance similar to arrowroot (sense 3), such as Zamia integrifolia (Florida arrowroot) or Pueraria montana var. lobata (Japanese arrowroot or kudzu). 

sago

noun
  • A powdered starch obtained from certain palms and used as a food thickener. 

  • A similar starch obtained from a palm-like cycad (Cycas revoluta) 

  • Any of the palms from which sago is extracted. 

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