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The site actually currently links outwards to a number of different state specific sites which act as a directory. We would essentially be bringing these sites under the same umbrella and creating a similar user experience. Given the drug and alcohol related article content, including a directory of drug and alcohol treatment centers is a relatively logical decision.

It's also partially a business decision as in our experience, the directory portion of the site converts users far better than article content into leads.

One option if adding that many pages is too much... Scaling back the number of pages added in the directory and slowly adding more over time.

We are considering adding roughly 1,300 pages to a 2,300 page website within the drug rehab niche.  Our website is generating roughly 10,000 uniques from Search / month.

**Is there a way to estimate the change in traffic to the existing content on the site when we add 30-40% pages in the form of a directory?  **

**Is there a way to estimate the effect of the existing traffic and links to our newly added part of the site (the directory)? **

We're wondering how important it is to use a keyword at least 4 times versus say 2.  Often times we use our keywords once or twice within the body of our pages with appropriate H1 and Alt text use.

Will we notice significant SEO benefits by using the KW at least 4 times given that we are scoring 'A's on almost all our pages via the On-Page Keyword Optimization Tool?

Thanks!