You call it a relationship
What do you call a four book series
Many call signs would be perfect for a relationship. Some examples are "in love," "In a relationship," and "All mine."
Emergency Call - TV series - was created in 1991.
A father and son relationship is called a paternal relationship.
The duration of Call the Midwife - TV series - is 3600.0 seconds.
The duration of Emergency Call - TV series - is 1800.0 seconds.
The duration of Call center - television series - is 1800.0 seconds.
Call center - television series - was created in 2005-11.
You would call this "dating" or simply "a relationship." If you get married, you would call this a "marriage."
Call the Midwife - TV series - was created on 2012-01-15.
It's not available for the Modern warfare series of call of duty