Google suggest helps us to know the search count of each keyword/search query. How do we choose the most searched keyword while optimizing our site for search engine optimization.

Lets say, i want my blog site to be listed on top for keywords zend framework. First thing what i did was, i used google suggest by typing zend framework, i got following result -

zend - 10,400,000 search count
zend framework - 560,000 search count
zend framework documentation - 1,150,000 search count

Which one do i choose among both? Well first thing that comes to our mind is zend keyword has more search count, lets choose that. But i would say zend framework documentation keyword has 10,400,000+560,000+1,150,000 search count.

choosing zend framework documentation, helps my blog page list for keywords zend framework documentation as well as for zend and zend framework, its because zend and zend framework keyword is part of zend framework documentation keyword.