An adverb of frequency explains how often something happened.
Here are some examples of adverbs of frequency:
| 
			 always  | 
			
			 constantly  | 
			
			 frequently  | 
		
| 
			 often  | 
			
			 rarely  | 
			
			 repeatedly  | 
		
| 
			 seldomly  | 
			
			 sometimes  | 
			
			 usually  | 
		
Here’s a diagram of how often things happen:
Adverbs of frequency can go anywhere in a sentence. The placement of the adverb does not affect the general meaning of the sentence.
For example:
However, the adverbs of frequency always, ever and never, shouldn’t be placed at the beginning of a sentence.
| 
			 Adequate use of always, ever and never  | 
			
			 Improper use of always, ever and never  | 
		
| 
			 Margaret is always hungry.  | 
			
			 Always is Margaret hungry.  | 
		
| 
			 This is the best day ever!  | 
			
			 Ever this is the best day!  | 
		
| 
			 She could never swim fast.  | 
			
			 Never could she swim fast.  | 
		
Margaret, the character used in the examples, was inspired by the Canadian author Margaret Atwood. To learn more about her extraordinary life and work, visit this website.