There is no specific time. You will be able to tell when the moment is right, i would think after a date or two it's okay to call her that. :) depends on the person really.
You can call HONEY, SWEETHEART, BABY, DARLING etc...
Something that you call a loved one, such as "sweetheart," "darling," "my love," etc.
honey, darling, sweetheart, dear, etc
sweetheart, my love, darling... you can also call him boo, sugar, pumpkin, baby boy, ect
It means sweetheart or darling, but it is also used for people older then you Younger siblings will call their older brother Abang
It is used in dating. 'Chellam' simply means 'beloved'. It is common for people to call each other 'Chellam' just as one would call another 'Darling'.
Let Me Call You Sweetheart was created in 1910.
Some nice names to call people could be sweetheart, honey, dear, love, or darling. It's important to choose names that are appropriate for the context and the relationship you have with the person.
He called her "querida." According to the Spanish-English dictionary this is translated as Darling or Sweetheart. More literally, it means "she whom I desire."
The cast of Just Call Me Darling - 2013 includes: Diamond Owens as Martha Darling Michael Sibila as Scott Darling
Vugglemantis
Sweetheart