It really depends on the office and how they like to do payroll. I’ve worked at some offices that pay on the 5th and the 20th of the month and some that pay once per month.
I have worked in several dental offices and they have all paid at different times. I have worked in offices that have paid me on the 5th and 20th like Kara said. The office I am currently in pays the staff every 2 weeks.