bai vs scullery maid

bai

noun
  • A people of the Yunnan province of China. 

  • A marshy meadow in sub-Saharan Africa. 

scullery maid

noun
  • A domestic servant, of lowest status, whose job is to wash dishes and do other menial chores. 

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