So I'm doing this basic research to see if my niche is worth to break in to it. What I do is I check how much searches does the keyword phrase get per month. Then I check how many results Google gives for my keyword phrase without quotes. Then WITH the quotes. Current kw phrase on my niche I'm looking into gets approx. 4 400 searches per month, without quotes Google gives me 422,000 results and with quotes 10,100. Is there a rule of thumb or recommended "ratio" between search volume and search results for a worthy niche?