Check out the 2010 in Review from Google Zeitgeist (spirit of the times). Analyzing what people search for gives you a sense on what people are generally concerned about.
Sometimes when you’re looking for examples or trends, using the Google search bar as an informal sociological tool can help. Typing out a query midway in the search bar and letting Google suggest a list of questions for you gives you invaluable insight into the pressing concerns of Google searchers all over the world. This article from Big Think cites some interesting finds about searches concerning husbands and wives.