76083 ÷ 21 
The aim is to understand the frequency of 21 in 76083.

Step 1:
21 goes into 7 0 times with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Append the next digit (6) from the dividend to 7 and continue with: 76 / 21

Let's proceed to step 2:
If we divide 76 by 21, we get 3 and a remainder of 13.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtract 63 from 76 to get 13.
Take the next digit (0) from the dividend and append it to 13, then repeat: 130 / 21

Advancing to step 3:
If we divide 130 by 21, we get 6 and a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 36.0
Subtract 126 from 130 to get 4.
Include the next digit (8) from the dividend after 4, then repeat: 48 / 21

Moving on to step 4:
If we divide 48 by 21, we get 2 and a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 362.0
Subtracting 42 from 48 leaves us with 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 21

Let's proceed to step 5:
21 goes into 63 3 times with a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 3623.0
The remainder is 0 after subtracting 63 from 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 6:
21 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 3623.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 7:
0 divided by 21 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 3623.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 3623.0 with a remainder of 0.0.