lam vs rain blows on

lam

noun
  • flight, escape 

  • The twenty-third letter of the Arabic alphabet, ل (l). It is preceded by ك (k) and followed by م (m). 

verb
  • To beat or thrash. 

rain blows on

How often have the words lam and rain blows on occurred in a corpus of books? (source: Google Ngram Viewer )