achar vs chowchow

achar

noun
  • A spicy and salty pickle in Indian cuisine. 

chowchow

noun
  • An American relish, containing pickled green tomatoes, cabbage, and often other vegetables. 

  • A Chinese preserve. 

adj
  • Consisting of several kinds mingled together; mixed. 

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