How to check domain age?

For checking domain age the tool is http://www.networksolutions.com/whois/index.jsp. This tool provide the full registration information about the domain age

For checking a particular keyword in how many pages it is used use the allintitle:"keyword" or inanchor:"keyword" in google search. You can check a keyword in title , text , anchor, url like allintext:, allinurl:, allintitle:, allinanchor:"Keyword."