included number; number within a total
Refers to a quantity that is part of a larger total, often used in statistics, reports, or breakdowns to indicate how many of a certain category are included in the overall figure.
Of the respondents, 120 were women (included in the total).
This figure is an included number, so it is already part of the overall total.
Compound of 内 (uchi, 'inside') and 数 (sū, 'number'). The reading うちすう follows standard on'yomi for 数.