But, I'll caveat that it is AN INDICATOR, and not the only indicator...And in fact, not even sure if search activity is a good enough signal to use as an input...Or at least not in isolation. Putting my digital adversarial hat on, if i had even meager resources to organize a bot farm to cleverly submit tons of searches in one direction or another, i think that would sufficiently skew your input signal right there. Just sayin'.
For this one point, Google Trends (formerly known as Zeitgeist) is available: https://trends.google.com/trends/?geo=US
But, I'll caveat that it is AN INDICATOR, and not the only indicator...And in fact, not even sure if search activity is a good enough signal to use as an input...Or at least not in isolation. Putting my digital adversarial hat on, if i had even meager resources to organize a bot farm to cleverly submit tons of searches in one direction or another, i think that would sufficiently skew your input signal right there. Just sayin'.