This statistic constantly confuses people who haven't done hiring.
If we decide we're going to grow headcount by 10 senior software engineers, we don't copy and paste the same job listing 10 times. We leave it open and collect resumes through that. At a large or fast growing company, we might never stop interviewing and hiring senior software engineers. The listing stays open for a year or more.
There are also specialty roles where hiring takes months. I've had niche roles open where we didn't get any applicants with any experience on the topic for over 90 days on multiple occasions.
If we decide we're going to grow headcount by 10 senior software engineers, we don't copy and paste the same job listing 10 times. We leave it open and collect resumes through that. At a large or fast growing company, we might never stop interviewing and hiring senior software engineers. The listing stays open for a year or more.
There are also specialty roles where hiring takes months. I've had niche roles open where we didn't get any applicants with any experience on the topic for over 90 days on multiple occasions.