We're dividing 70257631 by 812 
The aim is to understand the frequency of 812 in 70257631.

Step 1:
If we divide 7 by 812, we get 0 and a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (0) from the dividend, attach it to 7 and continue: 70 / 812

Step 2:
When dividing 70 by 812, we get 0 with a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 70 leaves us with 70.
Take the next digit (2) from the dividend and append it to 70, then repeat: 702 / 812

Advancing to step 3:
When dividing 702 by 812, we get 0 with a remainder of 702.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 702 after subtracting 0 from 702.
Fetch the next digit (5) from the dividend, attach it to 702 and continue: 7025 / 812

On to step 4:
If we divide 7025 by 812, we get 8 and a remainder of 529.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we subtract 6496 from 7025, we get 529.
Append the next digit (7) from the dividend to 529 and continue with: 5297 / 812

Step 5:
812 goes into 5297 6 times with a remainder of 425.
The number 6 becomes the next digit in our result. 
Result so far: 86.0
Subtracting 4872 from 5297 leaves us with 425.
Grab the next digit (6) from the dividend, add it to 425, then carry on: 4256 / 812

Step 6:
If we divide 4256 by 812, we get 5 and a remainder of 196.
Record the quotient 5 as the next digit in the result. 
Result so far: 865.0
Subtract 4060 from 4256 to get 196.
Fetch the next digit (3) from the dividend, attach it to 196 and continue: 1963 / 812

On to step 7:
The number 812 fits into 1963 2 times, leaving a remainder of 339.
Write down 2 as next digit of the result. 
Result so far: 8652.0
Subtract 1624 from 1963 to get 339.
Include the next digit (1) from the dividend after 339, then repeat: 3391 / 812

Going ahead to step 8:
3391 divided by 812 is 4 with a remainder of 143.
The next digit of our result is 4. 
Result so far: 86524.0
If we subtract 3248 from 3391, we get 143.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1430, and continue the process.

Let's proceed to step 9:
When dividing 1430 by 812, we get 1 with a remainder of 618.
Use 1 as the next digit of our solution. 
Result so far: 86524.1
If we subtract 812 from 1430, we get 618.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6180, and continue the process.

Advancing to step 10:
The number 812 fits into 6180 7 times, leaving a remainder of 496.
The next digit of our result is 7. 
Result so far: 86524.17
If we subtract 5684 from 6180, we get 496.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

Advancing to step 11:
When dividing 4960 by 812, we get 6 with a remainder of 88.
Record the quotient 6 as the next digit in the result. 
Result so far: 86524.176
The remainder is 88 after subtracting 4872 from 4960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Going ahead to step 12:
When dividing 880 by 812, we get 1 with a remainder of 68.
Use 1 as the next digit of our solution. 
Result so far: 86524.1761
If we take 812 away from 880, we end up 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.

Advancing to step 13:
812 can be fit into 680 0 times, resulting in a remainder of 680.
Write down 0 as next digit of the result. 
Result so far: 86524.1761
Subtract 0 from 680 to get 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

On to step 14:
When dividing 6800 by 812, we get 8 with a remainder of 304.
The number 8 becomes the next digit in our result. 
Result so far: 86524.176108
If we take 6496 away from 6800, we end up with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Advancing to step 15:
The number 812 fits into 3040 3 times, leaving a remainder of 604.
Put 3 as the next digit of the answer. 
Result so far: 86524.1761083
If we subtract 2436 from 3040, we get 604.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6040, and continue the process.

Going ahead to step 16:
812 goes into 6040 7 times with a remainder of 356.
Record the quotient 7 as the next digit in the result. 
Result so far: 86524.17610837
Subtract 5684 from 6040 to get 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

The final outcome is 86524.17610837, with a leftover of 3.56e-07.