alas vs oh dear

alas

intj
  • Used to express sorrow, regret, compassion or grief. 

noun
  • A type of depression which occurs in Yakutia, formed by the subsidence of permafrost. 

oh dear

intj
  • An expression of dismay, concern, worry or disapproval. 

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