dishrag vs loofah

dishrag

noun
  • A piece of cloth used for washing dishes. 

  • An unclean person; used in similes. 

loofah

noun
  • The dried fibrous interior used as a sponge for bathing 

  • Any bathing sponge 

  • A tropical vine, of the genus Luffa, having almost cylindrical fruit with a spongy, fibrous interior; the dishcloth gourd 

verb
  • To clean or scrub with a loofah. 

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