What is gfe_rd=cr&ei= ?

It is a cookie link redirected to your browser based on the country from which it is accessed.

Which means If your enter
https://www.google.com

it will return
 https://www.google.co.in/?gfe_rd=cr&ei=fgdfsg4534fdg

and browser will store the cookie and redirect to https://www.google.co.in

gfe=Google Front End
rd=Redirect
cr=Country
ei=Engine Id

This Engine Id is the cookie that is sent to our browser.

How to analyse your google web history ?

1)Download the google web history in csv format.

Note:you can download only 1000 logs at a time so you may choose to use the following tool to achieve bulk download.

2)Download the tool called R and try it with yourself you may find you browsing habits etc..

the output will come as Graphs of various kinds.

FYI:
The tool R is made by staticians for staticians

References:
http://ragrawal.wordpress.com/2012/05/10/google-web-history/
http://ragrawal.wordpress.com/2012/05/14/google-web-history-a-gold-mine-of-personal-information-part-ii/