Keyphrase Trends Over the Last Year

Anybody know of a free web site where I can do a keyphrase search trend
reports for the past year? I am looking for peak search periods for specific
keyphrase searches not found in standard "top" keyphrase search trends
reports.

I have been looking for something like this for a while with no success.

Any direction would be greatly appreciated.

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Fred web-site-promotion@canada.com
Ethical SEO Tips, Tools and Resources
www.rezultz-web-site-promotion.com