Using SERP (search engine results page) data collected over the last 13 months and the number of monthly searches for the keywords; “SEO”, “Search Engine Optimization, and “Search Engine Marketing”, we have prepared 2 charts showing the approximate number of visits to MOZ.com and SearchEngineland.com from exact match queries ("SEO", "Search Engine Marketing", "Search Engine Optimization") in Google and Bing search.
The estimated visits are a function of the average keyword rank for the exact match queries and the number of searches for these terms, which can both be obtained from Google Adwords and Bing Webmaster tools.
Approximate Vists from Exact-match SEO-related Search Queries
Approximate Vists from Exact-match "SEO" Search Query
Data Source: Google & Bing Webmaster Tools