Any guesses as to why there is strong seasonality in searches for "USSR", "Soviet", and "Cold War"?
https://trends.google.com/trends/explore?date=all&geo=US&q=ussr,soviet,cold%20war
Delete the "Cold War" item to rescale for a better look.
https://trends.google.com/trends/explore?date=all&geo=US&q=ussr,soviet,cold%20war
Delete the "Cold War" item to rescale for a better look.