The numbers of hours spent commuting to work by the employees of a company is each data set qualitative or quantitative?

The numbers of hours spent commuting to work by the employees of a company is quantitative data.

Explanation:

Quantitative research is a type of research method in which statistical, quantifiable, generalizable results are sought. The starting point is that there is an objective reality that quantitative research tries to measure in various ways to get information about this reality.

Quantitative research involves studying highly structured data, that is, data that can be quantified in categories or in numbers, such as responses from questionnaires with closed alternatives, measurement values and structured observation from controlled experiments, population statistics in epidemiological studies, and more.  

Quantitative research is used extensively in both natural and social sciences. In social science, the term is used in contrast to qualitative research.