arak vs arrack

arak

noun
  • A clear, unsweetened aniseed-flavoured alcoholic drink, produced and consumed primarily in the Middle East. 

  • A toothbrush tree (Salvadora persica). 

arrack

noun
  • An alcoholic drink made from sugar cane and fermented red rice in Indonesia. 

  • An alcoholic drink distilled from coconut palm flowers in South Asia. 

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