13721 ÷ 79 
The aim is to understand the frequency of 79 in 13721.

Advancing to step 1:
1 divided by 79 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 79

Advancing to step 2:
13 divided by 79 is 0 with a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 13, we end up with 13.
Append the next digit (7) from the dividend to 13 and continue with: 137 / 79

On to step 3:
If we divide 137 by 79, we get 1 and a remainder of 58.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 79 from 137 and we're left with 58.
Include the next digit (2) from the dividend after 58, then repeat: 582 / 79

Advancing to step 4:
79 can be fit into 582 7 times, resulting in a remainder of 29.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
If we subtract 553 from 582, we get 29.
Append the next digit (1) from the dividend to 29 and continue with: 291 / 79

Step 5:
The number 79 fits into 291 3 times, leaving a remainder of 54.
The number 3 becomes the next digit in our result. 
Result so far: 173.0
Subtracting 237 from 291 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 6:
79 goes into 540 6 times with a remainder of 66.
The number 6 becomes the next digit in our result. 
Result so far: 173.6
Subtracting 474 from 540 leaves us with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Let's proceed to step 7:
The number 79 fits into 660 8 times, leaving a remainder of 28.
Put 8 as the next digit of the answer. 
Result so far: 173.68
If we subtract 632 from 660, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 8:
280 divided by 79 is 3 with a remainder of 43.
The next digit of our result is 3. 
Result so far: 173.683
Deduct 237 from 280 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

On to step 9:
When dividing 430 by 79, we get 5 with a remainder of 35.
Write down 5 as next digit of the result. 
Result so far: 173.6835
Deduct 395 from 430 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 10:
The number 79 fits into 350 4 times, leaving a remainder of 34.
Record the quotient 4 as the next digit in the result. 
Result so far: 173.68354
If we take 316 away from 350, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 11:
When dividing 340 by 79, we get 4 with a remainder of 24.
Put 4 as the next digit of the answer. 
Result so far: 173.683544
If we take 316 away from 340, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The quotient of the division is 173.683544, and the remainder is 2.4e-06.