Do you know about Google Trends? If yes you are lucky one. But if you don't know then read post and you will know why it is so great and useful tool. When i start using this tool i understand it is one great help when you don't know about what write post. This tool shows how popular is keyword and it's shows you in what month and year it is popular. And other features.

Now with some screenshots i show you and tell something about them.

Keyword popularity chart: There you can see your keyword popularity by month and year period.

Regions: There you can see how popular is your keyword in every region.

Cities: Keyword popularity in cities.

Languages: Popularity by languages.

Choose regions and year: You can choose what regions you want and what year.

URL: http://www.google.com/trends