Google Keyword Data

Not sure if this is the right forum to put this but I’m trying to put something together on my site where clients can enter a keyword/phrase and it will tell them the details like google does so that they know what kind of competition is out there. It’s for an SEO type site. For example if it you put in ‘nexus’ in the form and click submit it will return results like this:

Online Competition Webpages: 43,400,000
Number of Websites: 1,446,667
Number of Commercial Websites: 180,833

Many thanks

Like this:

Bit I don’t know why they are asking for enter URL to check?