If you are writing a graduation thesis for a junior college or an undergraduate, the number of words required for a junior college and an undergraduate is similar, 8000- 10000 words, and the length will not exceed 15000 words. It usually takes about half a month to complete.
This depends on where it is published and the specific direction to judge the time. Generally, the periodical cycle is shorter, while the core periodical cycle is longer. It is easier to write in liberal arts and harder to write in science. You need to consult a lot of data to draw a conclusion, and the writing cycle must be very long.