joe vs wallah

joe

noun
  • A male; a guy; a fellow. 

  • Synonym of johannes (“An old Portuguese gold coin bearing a figure of John V of Portugal.”) 

  • Coffee. 

  • A spy, especially a double agent. 

wallah

noun
  • A guy or bloke. 

  • A servant or other person responsible for something, often specified before it, for example kitchen wallah. 

adv
  • by God (Allah); may God be my witness used in making a solemn oath 

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