README.md in time-duration-0.1.2 vs README.md in time-duration-0.1.3

@@ -37,9 +37,15 @@
 TimeDuration::Duration.new(minute: 10) # => 0:10
 TimeDuration::Duration.new(hour: 1) # => 1:00
 TimeDuration::Duration.new(hour: 1, minute: 10) # => 1:10
 ```
 
+#### Shorthands
+```ruby
+TimeDuration.hour(8) # => 8:00
+TimeDuration.minute(8) # => 0:08
+```
+
 ### Operations
 
 ```ruby
 duration = TimeDuration.parse('0:40') + TimeDuration.parse('0:30')
 duration.to_s # => "1:10"