If you toggle something you change it's state from low to high or vice versa depending on it's initial state. This means double the time for a complete cycle. Imagine people bringing their hands up and down when counting to three. Starting from all hands down it is 1...2...3 hands up and 1...2...3 hands down, resulting in 6 total for having their hands in the initial state again. Toggling always halves the frequency and doubles the time.
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