116066 divided by 21 
The aim is to understand the frequency of 21 in 116066.

Going ahead to step 1:
1 divided by 21 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 21

Moving on to step 2:
21 goes into 11 0 times with a remainder of 11.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 11, we end up with 11.
Grab the next digit (6) from the dividend, add it to 11, then carry on: 116 / 21

Moving on to step 3:
The number 21 fits into 116 5 times, leaving a remainder of 11.
Write down 5 as next digit of the result. 
Result so far: 5.0
Subtracting 105 from 116 leaves us with 11.
Take the next digit (0) from the dividend and append it to 11, then repeat: 110 / 21

Moving on to step 4:
110 divided by 21 is 5 with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 55.0
If we subtract 105 from 110, we get 5.
Append the next digit (6) from the dividend to 5 and continue with: 56 / 21

On to step 5:
21 goes into 56 2 times with a remainder of 14.
Use 2 as the next digit of our solution. 
Result so far: 552.0
If we take 42 away from 56, we end up with 14.
Bring next digit (6) of the dividend behind the 14 and repeat the process: 146 / 21

Moving on to step 6:
21 goes into 146 6 times with a remainder of 20.
Record the quotient 6 as the next digit in the result. 
Result so far: 5526.0
If we take 126 away from 146, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 7:
When dividing 200 by 21, we get 9 with a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 5526.9
If we subtract 189 from 200, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 8:
110 divided by 21 is 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 5526.95
If we take 105 away from 110, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 9:
When dividing 50 by 21, we get 2 with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 5526.952
If we take 42 away from 50, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 10:
21 goes into 80 3 times with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 5526.9523
Subtracting 63 from 80 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 11:
170 divided by 21 is 8 with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 5526.95238
Deduct 168 from 170 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 12:
21 can be fit into 20 0 times, resulting in a remainder of 20.
The next digit of our result is 0. 
Result so far: 5526.95238
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 13:
The number 21 fits into 200 9 times, leaving a remainder of 11.
The next digit of our result is 9. 
Result so far: 5526.9523809
If we take 189 away from 200, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 14:
When dividing 110 by 21, we get 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 5526.95238095
The remainder is 5 after subtracting 105 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final outcome is 5526.95238095, with a leftover of 5e-09.