It really depends. Some simple comics might take a few days, but complex ones could take months or even years.
It's hard to give a precise answer. The process of creating a comic book is quite involved. It can take anywhere from a month to several years. If the artist is very skilled and the story is straightforward, it might be quicker. But if there are many characters and intricate backgrounds, it'll take a lot longer.
The time to draw a comic book varies greatly. It depends on factors like the detail of the art, the complexity of the story, and the experience of the artist. A basic comic with simple illustrations could be done in a couple of weeks, while a highly detailed and elaborate one could take half a year or more.