The phrase "doth number on" is a form of Old English language that means to count or calculate. Synonyms for this phrase include tally, enumerate, reckon, total, sum, compute, quantify, measure, assess, and evaluate. Each of these words implies a different approach to counting, with "tally" suggesting a simple addition of numbers and "evaluate" implying a more critical analysis of data. Depending on the context, some of these synonyms may be more appropriate than others. However, they can all be used interchangeably to convey the general idea of counting or calculating.