undercount

present singular third person undercounts · participle present undercounting · participle past undercounted · past undercounted

1. To count to an insufficient degree; to count one thing disproportionately less than another

   But minority stations have claimed that they are undercounted in the new system, in part because Arbitron has struggled to include representative numbers of young and minority listeners in its sample.

   2009 January 8, Brian Stelter, “Arbitron Settles Lawsuit Alleging Bias in Radio Ratings System”, in New York Times

plural undercounts

1. An incorrect count that is too low.

   And that, Lady Darvish thought, was almost certainly an undercount.

   2023, Eleanor Catton, Birnam Wood, page 209