In some households if a set number of spankings are exceeded for given time period another one is administered to compound the punishment.
For example, if two or more spankings occur within a week a third is triggered for the end of the week to reinforce the earlier discipline.
My mother was an accomplished disciplinarian. She used a two-handed grip, and the handle of the paddle was about a foot long. Even the first stroke sent pain shattering throughout my body. She waited at least fifteen seconds before licks and a minute between sets. This just made the pain build up exponentially.