The phrase "erratic schedule" refers to a schedule that is not consistent or predictable, but instead changes frequently and unpredictably. Full definition
This may actually be a blessing to those busy owners with erratic schedules. (dogtrainingbasics.com)
«They have to be a certain type of individual,» he says, explaining that they have to be able to cope with conditions such as erratic schedules. (fooddrink-magazine.com)
For those who work with erratic schedules, there are driving schools that can actually bring the lessons even at your office. (wannadrive.com)