costumer vs seamstress

costumer

noun
  • A person who designs, makes or supplies theatrical costumes; a costumier. 

  • A costume drama. 

  • A person who wears a costume or takes part in cosplay. 

seamstress

noun
  • A woman who sews clothes professionally. 

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