Bluetits - 5 day gap in egg laying

Hi, We have a birdbox with camera. The bluetit nesting in there this year started laying on 13th April and layed an egg every morning for 5 days. Then from 18th to 22nd no eggs. Then on 23rd & 24th she layed 2 more eggs. Do bluetits normally have a break in laying like this (5 days).