564025 ÷ 91 
The aim is to understand the frequency of 91 in 564025.

Let's proceed to step 1:
If we divide 5 by 91, we get 0 and a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (6) from the dividend to 5 and continue with: 56 / 91

Advancing to step 2:
91 goes into 56 0 times with a remainder of 56.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 56, we end up with 56.
Bring next digit (4) of the dividend behind the 56 and repeat the process: 564 / 91

Going ahead to step 3:
564 divided by 91 is 6 with a remainder of 18.
The next digit of our result is 6. 
Result so far: 6.0
Subtract 546 from 564 to get 18.
Include the next digit (0) from the dividend after 18, then repeat: 180 / 91

On to step 4:
91 can be fit into 180 1 times, resulting in a remainder of 89.
Record the quotient 1 as the next digit in the result. 
Result so far: 61.0
The remainder is 89 after subtracting 91 from 180.
Fetch the next digit (2) from the dividend, attach it to 89 and continue: 892 / 91

Going ahead to step 5:
91 can be fit into 892 9 times, resulting in a remainder of 73.
The next digit of our result is 9. 
Result so far: 619.0
Subtracting 819 from 892 leaves us with 73.
Include the next digit (5) from the dividend after 73, then repeat: 735 / 91

Step 6:
91 can be fit into 735 8 times, resulting in a remainder of 7.
Put 8 as the next digit of the answer. 
Result so far: 6198.0
If we take 728 away from 735, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 7:
The number 91 fits into 70 0 times, leaving a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 6198.0
If we subtract 0 from 70, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 8:
700 divided by 91 is 7 with a remainder of 63.
Put 7 as the next digit of the answer. 
Result so far: 6198.07
If we subtract 637 from 700, we get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Step 9:
If we divide 630 by 91, we get 6 and a remainder of 84.
Put 6 as the next digit of the answer. 
Result so far: 6198.076
Deduct 546 from 630 and we're left with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Let's proceed to step 10:
If we divide 840 by 91, we get 9 and a remainder of 21.
Record the quotient 9 as the next digit in the result. 
Result so far: 6198.0769
If we subtract 819 from 840, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 11:
91 goes into 210 2 times with a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 6198.07692
Deduct 182 from 210 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.

Advancing to step 12:
280 divided by 91 is 3 with a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 6198.076923
If we take 273 away from 280, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 13:
The number 91 fits into 70 0 times, leaving a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 6198.076923
Subtracting 0 from 70 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 14:
91 can be fit into 700 7 times, resulting in a remainder of 63.
Use 7 as the next digit of our solution. 
Result so far: 6198.07692307
The remainder is 63 after subtracting 637 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

The quotient of the division is 6198.07692307, and the remainder is 6.3e-08.