Keyword and ranking numbers are often used interchangeably in the context of SEO, but they have a different meaning. In the toolbox, we usually measure the number of different (unique) keywords and not rankings.
If the domain sistrix.com ranks in position 1, 2, 5 and 7 for the keyword “sistrix”, the toolbox counts that as one keyword. However, many comparable applications, such as the Google Search Console, measure rankings and would report four rankings in this example. This means that keyword and ranking numbers cannot be compared across providers.