Where can I find a search engine that shows how many times various
words were searched last month on a search engine or group of search
engines, e.g., wedding - 900,500, wedding vow -- 355, wedding dress --
1,855, etc.?

Dear heiland:

Thank you for your question. I have found two such search engines that
do exactly what you are looking for:

The first one is the Overture Inventory Suggestion system. You can
check that out here:

http://inventory.overture.com

Simply enter the search term desired and it will return the number of
times it was searched over various search engines on the Internet
(including MSN, Lycos, and Goto).

The second one is the WordTracker service. You can sign up for a free
trial immediately, with only an email address. The source of their
numbers come from the meta search engines MetaCrawler and Dogpile.

http://www.wordtracker.com

Related Resources:

Most Frequently Used Search Words
https://answers.google.com/answers/main?cmd=threadview&id=34028

Google Zeitgeist
://www.google.com/press/zeitgeist.html


Google Search Terms:
    
     wordtracker
     ://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&safe=off&q=wordtracker&btnG=Google+Search


I hope this was the information you were looking for. If you neeed any
clarifications, please don't hesitate to ask. I would be more than
happy to assist you further.

Best Regards,
blader-ga

A smaller search engine called 7search also does this:
http://www.7search.com/scripts/advertiser/sample_get.asp

There is also the Lycos top 50 searched words that is updated monthly.

http://50.lycos.com/