miscount

To count (something) incorrectly; miscalculate.

To make an incorrect count.

An inaccurate count.

An erroneous counting or numbering.

To count erroneously; mistake in counting.

To account wrongly; misjudge or misconstrue.

To make a false reckoning.

To count erroneously.

An erroneous counting.

An erroneous count of ballots cast in an election.