This marathon was broken down into half - mile intervals run over the course of nine months. (health.com)
I can run very comfortably a 10:00 min mile pace and have tested my heart rate at 127 to 130 at one mile intervals for a six mile run at that pace. (philmaffetone.com)
I think I have the service miles interval, so I know when a service is due - again this is about 60 miles out. (mechanics.stackexchange.com)