by the day

one day at a time. I don't know when I'll have to leave town, so I rent this room by the day.

by the day

Also, by the hour or week or month or year . According to a specific time period, as in I'm renting this car by the day, or He's being paid by the hour. This usage generally describes some kind of rate. [1400s]

Common Names:

Name	Pronounced	Usage
ÁSdÍS	-	Icelandic, Ancient Scandinavian
Laurentia	-	Ancient Roman
Nicodemus	nik-ə-DEE-məs (English)	Biblical, Biblical Latin
Cutler	['kʌtlə]
Cal	KAL	English
Franjo	FRAH-nyo	Croatian, Serbian