As has been mentioned here, this can often vary depending on the industry and size of the company that you're looking to join.
However, for someone who is looking for their first career coming out of school, I would budget anywhere between 3-6 months in order to land the job. You'll need to take into account of all of steps that are involved in the application and interview process:
- Submitting resumé & cover letter
- First-round interview with HR Recruiter
- Follow-Up interviews: This can range anywhere from 2-6 rounds of interviews with various team members, management, executives, etc.
- Contract negotiation
For smaller companies, I've heard of cases where the above steps can be completed in a matter of weeks, while larger, established corporations can take many months simply due to the amount of administrative steps that happen on the employer side.
Best of luck on the job search! The fact that you're on this platform shows that you're getting ahead of game!