15829721 ÷ 218 
The aim is to understand the frequency of 218 in 15829721.

Let's proceed to step 1:
If we divide 1 by 218, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 218

Let's proceed to step 2:
If we divide 15 by 218, we get 0 and a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 15 to get 15.
Take the next digit (8) from the dividend and append it to 15, then repeat: 158 / 218

Moving on to step 3:
If we divide 158 by 218, we get 0 and a remainder of 158.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 158 leaves us with 158.
Take the next digit (2) from the dividend and append it to 158, then repeat: 1582 / 218

Step 4:
218 can be fit into 1582 7 times, resulting in a remainder of 56.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Deduct 1526 from 1582 and we're left with 56.
Grab the next digit (9) from the dividend, add it to 56, then carry on: 569 / 218

On to step 5:
If we divide 569 by 218, we get 2 and a remainder of 133.
The next digit of our result is 2. 
Result so far: 72.0
The remainder is 133 after subtracting 436 from 569.
Take the next digit (7) from the dividend and append it to 133, then repeat: 1337 / 218

Advancing to step 6:
218 can be fit into 1337 6 times, resulting in a remainder of 29.
Write down 6 as next digit of the result. 
Result so far: 726.0
Subtract 1308 from 1337 to get 29.
Bring next digit (2) of the dividend behind the 29 and repeat the process: 292 / 218

Advancing to step 7:
218 goes into 292 1 times with a remainder of 74.
Use 1 as the next digit of our solution. 
Result so far: 7261.0
The remainder is 74 after subtracting 218 from 292.
Bring next digit (1) of the dividend behind the 74 and repeat the process: 741 / 218

Going ahead to step 8:
218 can be fit into 741 3 times, resulting in a remainder of 87.
Put 3 as the next digit of the answer. 
Result so far: 72613.0
Deduct 654 from 741 and we're left with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Moving on to step 9:
The number 218 fits into 870 3 times, leaving a remainder of 216.
Use 3 as the next digit of our solution. 
Result so far: 72613.3
Subtract 654 from 870 to get 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Moving on to step 10:
The number 218 fits into 2160 9 times, leaving a remainder of 198.
The number 9 becomes the next digit in our result. 
Result so far: 72613.39
Deduct 1962 from 2160 and we're left with 198.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1980, and continue the process.

Advancing to step 11:
If we divide 1980 by 218, we get 9 and a remainder of 18.
Record the quotient 9 as the next digit in the result. 
Result so far: 72613.399
Deduct 1962 from 1980 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Our division results in 72613.399 with a remaining 0.0018.