Man pages matching name attean::api::aggregateexpression in section 3pm:

Attean::API::AggregateExpression.3pm.en	debian 10 / libattean-perl
Attean::API::AggregateExpression.3pm.en	debian 11 / libattean-perl
Attean::API::AggregateExpression.3pm.en	debian 12 / libattean-perl