def plot_keywords(self, event, words, period):
time_series = []
for i in range(len(words)):
original_series = TimeSeries(words[i]).get_series()
original_series = original_series.get_modified_series(original_series)
series = original_series.smoothify_series(original_series, 2)
time_series.append(series)
x0 = [i + self.year_range[0] for i in range(self.max_range)]
plotter = Plotter(x0, [], period)
plotter.plot_keywords(event, words, time_series)
