plural of kilowatt-hour

plural of terawatt-hour

The hours and days when a given business is available to the public. / The hours and days when businesses generally operate; 8:00 AM to 5:00 PM, Monday to Friday.

plural of blue hour

plural of rush hour

plural of witching hour

plural of book of hours

An illuminated Christian devotional book, popular in the Middle Ages.

plural of zero hour

plural of half-hour