Understanding the google algorithm has been tried by technocrats and none came up with a definite paper.

But may be some have solved but did not bother to reveal to you and me.

Here is a blog post that attempted something in this arena.

" GoogScore = (KW Usage Score * 0.3) + (Domain Strength * 0.25) + (Inbound Link Score * 0.25) + (User Data * 0.1) + (Content Quality Score * 0.1) + (Manual Boosts) - (Automated & Manual Penalties)
KW Usage Factors:
• KW in title tag
• KW in header tags
• KW in document text
• KW in internal links pointing to the page
• KW in domain and/or URL "

Oh no, too complicated for me. But may be it is easy for you.

Read it here: A Little Piece of the Google Algorithm – Revealed