Google trends will help you decide what post will be trending and what won’t. Google trends show graphs of how popular a search term is at a particular event. It is useful for your post so you can determine what your readers are actually searching for when looking for your post.
Here is a shortcode to embed Google Trends post in pages.
Here is the short code snippet:
[trends h="450" w="500" q="wpsnipp,wordpress,+wordpress+theme,+wordpress+plugin,+wordpress+snippets" geo="US"]
Read the rest of the code here: http://wpsnipp.com/index.php/functions-php/shortcode-embed-google-trends-graph-in-posts-and-pages/