Very interesting stats in two places. One is Domain Tools a site that tracks the number of active and defunct websites. Current number of active websites: 133,124,135. That's a lot of possible hits.
The other site is Google Trends, which shows interesting tallies for the most used search word(s) in any given period. You can compare websites to see which is being visited or searched for the most. So, if you curious about what others are curious about - you can find and reseach all about it at Google Trends.