91718631 divided by 756 
The aim is to understand the frequency of 756 in 91718631.

Step 1:
The number 756 fits into 9 0 times, leaving a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 756

Let's proceed to step 2:
756 goes into 91 0 times with a remainder of 91.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 91, we get 91.
Grab the next digit (7) from the dividend, add it to 91, then carry on: 917 / 756

On to step 3:
756 goes into 917 1 times with a remainder of 161.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 161 after subtracting 756 from 917.
Fetch the next digit (1) from the dividend, attach it to 161 and continue: 1611 / 756

On to step 4:
756 can be fit into 1611 2 times, resulting in a remainder of 99.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we take 1512 away from 1611, we end up with 99.
Append the next digit (8) from the dividend to 99 and continue with: 998 / 756

On to step 5:
998 divided by 756 is 1 with a remainder of 242.
Use 1 as the next digit of our solution. 
Result so far: 121.0
The remainder is 242 after subtracting 756 from 998.
Include the next digit (6) from the dividend after 242, then repeat: 2426 / 756

On to step 6:
756 can be fit into 2426 3 times, resulting in a remainder of 158.
Record the quotient 3 as the next digit in the result. 
Result so far: 1213.0
Subtracting 2268 from 2426 leaves us with 158.
Grab the next digit (3) from the dividend, add it to 158, then carry on: 1583 / 756

Advancing to step 7:
The number 756 fits into 1583 2 times, leaving a remainder of 71.
Use 2 as the next digit of our solution. 
Result so far: 12132.0
If we take 1512 away from 1583, we end up with 71.
Grab the next digit (1) from the dividend, add it to 71, then carry on: 711 / 756

Let's proceed to step 8:
756 can be fit into 711 0 times, resulting in a remainder of 711.
The next digit of our result is 0. 
Result so far: 121320.0
Subtract 0 from 711 to get 711.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7110, and continue the process.

Moving on to step 9:
756 can be fit into 7110 9 times, resulting in a remainder of 306.
Put 9 as the next digit of the answer. 
Result so far: 121320.9
Subtracting 6804 from 7110 leaves us with 306.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3060, and continue the process.

Advancing to step 10:
756 goes into 3060 4 times with a remainder of 36.
The next digit of our result is 4. 
Result so far: 121320.94
If we subtract 3024 from 3060, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 11:
The number 756 fits into 360 0 times, leaving a remainder of 360.
The next digit of our result is 0. 
Result so far: 121320.94
If we subtract 0 from 360, we get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Going ahead to step 12:
756 goes into 3600 4 times with a remainder of 576.
The number 4 becomes the next digit in our result. 
Result so far: 121320.9404
Subtracting 3024 from 3600 leaves us with 576.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5760, and continue the process.

Going ahead to step 13:
If we divide 5760 by 756, we get 7 and a remainder of 468.
Put 7 as the next digit of the answer. 
Result so far: 121320.94047
Deduct 5292 from 5760 and we're left with 468.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4680, and continue the process.

Moving on to step 14:
756 can be fit into 4680 6 times, resulting in a remainder of 144.
Write down 6 as next digit of the result. 
Result so far: 121320.940476
Subtracting 4536 from 4680 leaves us with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Step 15:
If we divide 1440 by 756, we get 1 and a remainder of 684.
The next digit of our result is 1. 
Result so far: 121320.9404761
The remainder is 684 after subtracting 756 from 1440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6840, and continue the process.

Moving on to step 16:
If we divide 6840 by 756, we get 9 and a remainder of 36.
The number 9 becomes the next digit in our result. 
Result so far: 121320.94047619
If we subtract 6804 from 6840, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

The final outcome is 121320.94047619, with a leftover of 3.6e-08.