quantitative analysis - Twitter?

[Mas]

i need to make a quantitative analysis how often a keyword is mentioned on a special social media site, my parameters time: 01/08/08 - 31/08/09, place: Germany
Website: Twitter.

Please any help how and where to find this? I need it urgently.

I thank you before hands

[columbus]

http://www.google.com/trends?q=Quantitative+analysis
Or you can count the number of entries for this period.