Several morphemes of space-time partners

Does the subject want to ask "how many factors accompany time and space"? After close contact, the COVID-19 epidemic gave birth to a new name, called space-time companion. Its definition refers to the person who stays with the confirmed patient 14 days * * * stay 10 minute in the same time-space grid (usually 800 meters by 800 meters as the detection range). Total * * is three factors, which is consistent with three factors.