Nick, as Lorna has hinted at, you need to consider precisely what statistics you are looking for and why.
You need to clarify what you mean by different Occupations, and check that
Tools > Work with Data > Occupations lists those Occupations consistently without any inadvertent typing mistakes.
Lorna has pointed out some synonymous Occupations that you may want to converge, but there may be many others, or perhaps you are not concerned with such anomalies.
Also, exactly what do you want to count? As Lorna has said, if every Occupation Fact is counted, and the same Occupation for the same Woman appears in several of her Occupations Facts, then they will each get counted.
What is the purpose of the statistic?
However, I have adapted my
Occupations Per Census Year Plugin to include
Gender counts.
You can download & install it via SkyDrive link
Occupations Per Census Year V1.4 and double-clicking on popup box.
To get the
Female counts in descending order, hold down
Alt key and click on
Female column heading.
Let me know if it does what you want.