Usage of time as an industrial category

We have 'Through the Looking Glass' in our syllabus. The question I got for my assignment which I'm not able to comprehend is -

Critically comment on Lewis Carroll's usage of time as an industrial category.

I've read the text but I'm not able to get the question maybe due to less knowledge on the background. Please just give me a hint or an idea about what needs to be included so that I can write the answer!