south wind vs southerly

south wind

noun
  • A wind blowing from the south. 

southerly

noun
  • A wind blowing from the south. 

adv
  • From the south. 

  • In a southward direction or position; (towards the) south. 

adj
  • Located towards or in the south. 

  • Facing the south; directed towards the south. 

  • Coming from the south. 

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