Systems and methods for trend detection using frequency analysis in accordance with embodiments of the invention are disclosed. In one embodiment of the invention, trend detection includes generating a discrete time sequence of word counts for a target word using a trend detection device, performing frequency analysis of the discrete time sequence of word counts to determine contributions of frequency components within different frequency ranges to the discrete time sequence of word counts using the trend detection device, and detecting that the target word is a trending keyword based upon at least the frequency analysis of the discrete time sequence of word counts for the target word using the trend detection device.