We look at the division of 21697615 by 891 
The aim is to understand the frequency of 891 in 21697615.

On to step 1:
The number 891 fits into 2 0 times, leaving a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 891

Moving on to step 2:
When dividing 21 by 891, we get 0 with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Take the next digit (6) from the dividend and append it to 21, then repeat: 216 / 891

Going ahead to step 3:
216 divided by 891 is 0 with a remainder of 216.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 216, we get 216.
Fetch the next digit (9) from the dividend, attach it to 216 and continue: 2169 / 891

Let's proceed to step 4:
2169 divided by 891 is 2 with a remainder of 387.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 1782 from 2169 and we're left with 387.
Take the next digit (7) from the dividend and append it to 387, then repeat: 3877 / 891

Step 5:
3877 divided by 891 is 4 with a remainder of 313.
Record the quotient 4 as the next digit in the result. 
Result so far: 24.0
If we subtract 3564 from 3877, we get 313.
Grab the next digit (6) from the dividend, add it to 313, then carry on: 3136 / 891

Let's proceed to step 6:
891 can be fit into 3136 3 times, resulting in a remainder of 463.
Put 3 as the next digit of the answer. 
Result so far: 243.0
Subtracting 2673 from 3136 leaves us with 463.
Include the next digit (1) from the dividend after 463, then repeat: 4631 / 891

Advancing to step 7:
If we divide 4631 by 891, we get 5 and a remainder of 176.
Use 5 as the next digit of our solution. 
Result so far: 2435.0
If we take 4455 away from 4631, we end up with 176.
Take the next digit (5) from the dividend and append it to 176, then repeat: 1765 / 891

Going ahead to step 8:
891 goes into 1765 1 times with a remainder of 874.
Record the quotient 1 as the next digit in the result. 
Result so far: 24351.0
If we take 891 away from 1765, we end up with 874.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8740, and continue the process.

Step 9:
891 goes into 8740 9 times with a remainder of 721.
Put 9 as the next digit of the answer. 
Result so far: 24351.9
Subtracting 8019 from 8740 leaves us with 721.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7210, and continue the process.

On to step 10:
891 can be fit into 7210 8 times, resulting in a remainder of 82.
Record the quotient 8 as the next digit in the result. 
Result so far: 24351.98
Subtract 7128 from 7210 to get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

On to step 11:
If we divide 820 by 891, we get 0 and a remainder of 820.
Use 0 as the next digit of our solution. 
Result so far: 24351.98
Subtract 0 from 820 to get 820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8200, and continue the process.

On to step 12:
If we divide 8200 by 891, we get 9 and a remainder of 181.
Put 9 as the next digit of the answer. 
Result so far: 24351.9809
Subtract 8019 from 8200 to get 181.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1810, and continue the process.

Going ahead to step 13:
891 can be fit into 1810 2 times, resulting in a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 24351.98092
Deduct 1782 from 1810 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 14:
When dividing 280 by 891, we get 0 with a remainder of 280.
The number 0 becomes the next digit in our result. 
Result so far: 24351.98092
Subtracting 0 from 280 leaves us with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Going ahead to step 15:
If we divide 2800 by 891, we get 3 and a remainder of 127.
Use 3 as the next digit of our solution. 
Result so far: 24351.9809203
Subtract 2673 from 2800 to get 127.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1270, and continue the process.

Let's proceed to step 16:
891 goes into 1270 1 times with a remainder of 379.
Use 1 as the next digit of our solution. 
Result so far: 24351.98092031
Subtract 891 from 1270 to get 379.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3790, and continue the process.

Our division results in 24351.98092031 with a remaining 3.79e-07.