Historically, deduplication functioned with a tolerance of one. This meant the second time a same value event is received, it would be treated as a duplicate.
Now, you can define the tolerance in the build pane using
TOLERANCE, you can specify how many times an event can run before it is considered a duplicate.
A great use of this is for rate limiting. Combining
PERIOD, you can define when to count an event as duplicate within a set time period. For example, 5 times within 10 seconds.