We look at the division of 28819913 by 216 
The aim is to understand the frequency of 216 in 28819913.

Advancing to step 1:
216 can be fit into 2 0 times, resulting in a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 216

On to step 2:
216 can be fit into 28 0 times, resulting in a remainder of 28.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 28, we end up with 28.
Include the next digit (8) from the dividend after 28, then repeat: 288 / 216

Let's proceed to step 3:
216 can be fit into 288 1 times, resulting in a remainder of 72.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 216 from 288 and we're left with 72.
Grab the next digit (1) from the dividend, add it to 72, then carry on: 721 / 216

Step 4:
216 goes into 721 3 times with a remainder of 73.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
Subtracting 648 from 721 leaves us with 73.
Grab the next digit (9) from the dividend, add it to 73, then carry on: 739 / 216

Going ahead to step 5:
The number 216 fits into 739 3 times, leaving a remainder of 91.
The next digit of our result is 3. 
Result so far: 133.0
If we take 648 away from 739, we end up with 91.
Grab the next digit (9) from the dividend, add it to 91, then carry on: 919 / 216

Advancing to step 6:
If we divide 919 by 216, we get 4 and a remainder of 55.
Write down 4 as next digit of the result. 
Result so far: 1334.0
If we take 864 away from 919, we end up with 55.
Grab the next digit (1) from the dividend, add it to 55, then carry on: 551 / 216

Step 7:
If we divide 551 by 216, we get 2 and a remainder of 119.
Put 2 as the next digit of the answer. 
Result so far: 13342.0
Subtract 432 from 551 to get 119.
Bring next digit (3) of the dividend behind the 119 and repeat the process: 1193 / 216

Let's proceed to step 8:
If we divide 1193 by 216, we get 5 and a remainder of 113.
Write down 5 as next digit of the result. 
Result so far: 133425.0
Deduct 1080 from 1193 and we're left with 113.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1130, and continue the process.

Moving on to step 9:
216 can be fit into 1130 5 times, resulting in a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 133425.5
If we subtract 1080 from 1130, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 10:
216 can be fit into 500 2 times, resulting in a remainder of 68.
The next digit of our result is 2. 
Result so far: 133425.52
Subtracting 432 from 500 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

On to step 11:
When dividing 680 by 216, we get 3 with a remainder of 32.
Write down 3 as next digit of the result. 
Result so far: 133425.523
If we take 648 away from 680, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 12:
The number 216 fits into 320 1 times, leaving a remainder of 104.
The next digit of our result is 1. 
Result so far: 133425.5231
Deduct 216 from 320 and we're left with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Moving on to step 13:
The number 216 fits into 1040 4 times, leaving a remainder of 176.
Record the quotient 4 as the next digit in the result. 
Result so far: 133425.52314
Subtract 864 from 1040 to get 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

On to step 14:
1760 divided by 216 is 8 with a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 133425.523148
Deduct 1728 from 1760 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 15:
320 divided by 216 is 1 with a remainder of 104.
The next digit of our result is 1. 
Result so far: 133425.5231481
If we take 216 away from 320, we end up with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Moving on to step 16:
If we divide 1040 by 216, we get 4 and a remainder of 176.
Use 4 as the next digit of our solution. 
Result so far: 133425.52314814
If we subtract 864 from 1040, we get 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

The final result is 133425.52314814 with a remainder of 1.76e-07.