91203770 divided by 531 
The aim is to understand the frequency of 531 in 91203770.

Step 1:
The number 531 fits into 9 0 times, leaving a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 531

On to step 2:
91 divided by 531 is 0 with a remainder of 91.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 91, we get 91.
Fetch the next digit (2) from the dividend, attach it to 91 and continue: 912 / 531

Going ahead to step 3:
912 divided by 531 is 1 with a remainder of 381.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 531 from 912, we get 381.
Fetch the next digit (0) from the dividend, attach it to 381 and continue: 3810 / 531

Going ahead to step 4:
The number 531 fits into 3810 7 times, leaving a remainder of 93.
Put 7 as the next digit of the answer. 
Result so far: 17.0
If we take 3717 away from 3810, we end up with 93.
Append the next digit (3) from the dividend to 93 and continue with: 933 / 531

Moving on to step 5:
933 divided by 531 is 1 with a remainder of 402.
The number 1 becomes the next digit in our result. 
Result so far: 171.0
If we subtract 531 from 933, we get 402.
Fetch the next digit (7) from the dividend, attach it to 402 and continue: 4027 / 531

Moving on to step 6:
When dividing 4027 by 531, we get 7 with a remainder of 310.
Put 7 as the next digit of the answer. 
Result so far: 1717.0
Deduct 3717 from 4027 and we're left with 310.
Append the next digit (7) from the dividend to 310 and continue with: 3107 / 531

Advancing to step 7:
The number 531 fits into 3107 5 times, leaving a remainder of 452.
Write down 5 as next digit of the result. 
Result so far: 17175.0
Subtract 2655 from 3107 to get 452.
Take the next digit (0) from the dividend and append it to 452, then repeat: 4520 / 531

Advancing to step 8:
If we divide 4520 by 531, we get 8 and a remainder of 272.
Record the quotient 8 as the next digit in the result. 
Result so far: 171758.0
The remainder is 272 after subtracting 4248 from 4520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Let's proceed to step 9:
The number 531 fits into 2720 5 times, leaving a remainder of 65.
Put 5 as the next digit of the answer. 
Result so far: 171758.5
Subtract 2655 from 2720 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Moving on to step 10:
When dividing 650 by 531, we get 1 with a remainder of 119.
Put 1 as the next digit of the answer. 
Result so far: 171758.51
If we subtract 531 from 650, we get 119.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

Advancing to step 11:
When dividing 1190 by 531, we get 2 with a remainder of 128.
Put 2 as the next digit of the answer. 
Result so far: 171758.512
The remainder is 128 after subtracting 1062 from 1190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Moving on to step 12:
The number 531 fits into 1280 2 times, leaving a remainder of 218.
The number 2 becomes the next digit in our result. 
Result so far: 171758.5122
The remainder is 218 after subtracting 1062 from 1280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

In conclusion, the division gives 171758.5122 with a balance of 0.00218.