91208646 ÷ 531 
The aim is to understand the frequency of 531 in 91208646.

Step 1:
When dividing 9 by 531, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 531

Let's proceed to step 2:
91 divided by 531 is 0 with a remainder of 91.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 91 after subtracting 0 from 91.
Include the next digit (2) from the dividend after 91, then repeat: 912 / 531

Advancing to step 3:
If we divide 912 by 531, we get 1 and a remainder of 381.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 531 from 912 leaves us with 381.
Grab the next digit (0) from the dividend, add it to 381, then carry on: 3810 / 531

Going ahead to step 4:
The number 531 fits into 3810 7 times, leaving a remainder of 93.
The next digit of our result is 7. 
Result so far: 17.0
If we subtract 3717 from 3810, we get 93.
Bring next digit (8) of the dividend behind the 93 and repeat the process: 938 / 531

Going ahead to step 5:
When dividing 938 by 531, we get 1 with a remainder of 407.
Record the quotient 1 as the next digit in the result. 
Result so far: 171.0
Deduct 531 from 938 and we're left with 407.
Include the next digit (6) from the dividend after 407, then repeat: 4076 / 531

Moving on to step 6:
When dividing 4076 by 531, we get 7 with a remainder of 359.
Record the quotient 7 as the next digit in the result. 
Result so far: 1717.0
The remainder is 359 after subtracting 3717 from 4076.
Bring next digit (4) of the dividend behind the 359 and repeat the process: 3594 / 531

Going ahead to step 7:
If we divide 3594 by 531, we get 6 and a remainder of 408.
Write down 6 as next digit of the result. 
Result so far: 17176.0
If we subtract 3186 from 3594, we get 408.
Bring next digit (6) of the dividend behind the 408 and repeat the process: 4086 / 531

On to step 8:
When dividing 4086 by 531, we get 7 with a remainder of 369.
The next digit of our result is 7. 
Result so far: 171767.0
Subtract 3717 from 4086 to get 369.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3690, and continue the process.

Advancing to step 9:
When dividing 3690 by 531, we get 6 with a remainder of 504.
Put 6 as the next digit of the answer. 
Result so far: 171767.6
Subtract 3186 from 3690 to get 504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5040, and continue the process.

Step 10:
5040 divided by 531 is 9 with a remainder of 261.
The next digit of our result is 9. 
Result so far: 171767.69
The remainder is 261 after subtracting 4779 from 5040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2610, and continue the process.

Let's proceed to step 11:
531 can be fit into 2610 4 times, resulting in a remainder of 486.
Write down 4 as next digit of the result. 
Result so far: 171767.694
If we take 2124 away from 2610, we end up with 486.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4860, and continue the process.

Step 12:
When dividing 4860 by 531, we get 9 with a remainder of 81.
The number 9 becomes the next digit in our result. 
Result so far: 171767.6949
Deduct 4779 from 4860 and we're left with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Let's proceed to step 13:
810 divided by 531 is 1 with a remainder of 279.
Record the quotient 1 as the next digit in the result. 
Result so far: 171767.69491
Deduct 531 from 810 and we're left with 279.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2790, and continue the process.

Moving on to step 14:
531 can be fit into 2790 5 times, resulting in a remainder of 135.
Use 5 as the next digit of our solution. 
Result so far: 171767.694915
If we take 2655 away from 2790, we end up with 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Let's proceed to step 15:
531 goes into 1350 2 times with a remainder of 288.
Use 2 as the next digit of our solution. 
Result so far: 171767.6949152
Subtracting 1062 from 1350 leaves us with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Let's proceed to step 16:
531 goes into 2880 5 times with a remainder of 225.
Record the quotient 5 as the next digit in the result. 
Result so far: 171767.69491525
The remainder is 225 after subtracting 2655 from 2880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

The final outcome is 171767.69491525, with a leftover of 2.25e-07.