We're dividing 91215533 by 553 
The aim is to understand the frequency of 553 in 91215533.

Let's proceed to step 1:
If we divide 9 by 553, we get 0 and a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 553

Going ahead to step 2:
553 goes into 91 0 times with a remainder of 91.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 91 after subtracting 0 from 91.
Append the next digit (2) from the dividend to 91 and continue with: 912 / 553

Going ahead to step 3:
553 goes into 912 1 times with a remainder of 359.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 553 from 912 to get 359.
Bring next digit (1) of the dividend behind the 359 and repeat the process: 3591 / 553

Let's proceed to step 4:
The number 553 fits into 3591 6 times, leaving a remainder of 273.
Write down 6 as next digit of the result. 
Result so far: 16.0
Subtracting 3318 from 3591 leaves us with 273.
Bring next digit (5) of the dividend behind the 273 and repeat the process: 2735 / 553

On to step 5:
The number 553 fits into 2735 4 times, leaving a remainder of 523.
Use 4 as the next digit of our solution. 
Result so far: 164.0
The remainder is 523 after subtracting 2212 from 2735.
Take the next digit (5) from the dividend and append it to 523, then repeat: 5235 / 553

Moving on to step 6:
553 can be fit into 5235 9 times, resulting in a remainder of 258.
Write down 9 as next digit of the result. 
Result so far: 1649.0
If we subtract 4977 from 5235, we get 258.
Bring next digit (3) of the dividend behind the 258 and repeat the process: 2583 / 553

Advancing to step 7:
2583 divided by 553 is 4 with a remainder of 371.
Put 4 as the next digit of the answer. 
Result so far: 16494.0
Subtract 2212 from 2583 to get 371.
Include the next digit (3) from the dividend after 371, then repeat: 3713 / 553

Moving on to step 8:
If we divide 3713 by 553, we get 6 and a remainder of 395.
Put 6 as the next digit of the answer. 
Result so far: 164946.0
Deduct 3318 from 3713 and we're left with 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

On to step 9:
553 goes into 3950 7 times with a remainder of 79.
Record the quotient 7 as the next digit in the result. 
Result so far: 164946.7
Subtract 3871 from 3950 to get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Going ahead to step 10:
553 goes into 790 1 times with a remainder of 237.
The next digit of our result is 1. 
Result so far: 164946.71
If we subtract 553 from 790, we get 237.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

Moving on to step 11:
553 can be fit into 2370 4 times, resulting in a remainder of 158.
Record the quotient 4 as the next digit in the result. 
Result so far: 164946.714
If we take 2212 away from 2370, we end up with 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Moving on to step 12:
1580 divided by 553 is 2 with a remainder of 474.
Use 2 as the next digit of our solution. 
Result so far: 164946.7142
Subtracting 1106 from 1580 leaves us with 474.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4740, and continue the process.

Step 13:
The number 553 fits into 4740 8 times, leaving a remainder of 316.
The number 8 becomes the next digit in our result. 
Result so far: 164946.71428
Deduct 4424 from 4740 and we're left with 316.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3160, and continue the process.

Step 14:
When dividing 3160 by 553, we get 5 with a remainder of 395.
The next digit of our result is 5. 
Result so far: 164946.714285
Deduct 2765 from 3160 and we're left with 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

Advancing to step 15:
The number 553 fits into 3950 7 times, leaving a remainder of 79.
Write down 7 as next digit of the result. 
Result so far: 164946.7142857
Subtracting 3871 from 3950 leaves us with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Advancing to step 16:
553 goes into 790 1 times with a remainder of 237.
The next digit of our result is 1. 
Result so far: 164946.71428571
Deduct 553 from 790 and we're left with 237.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

The final result is 164946.71428571 with a remainder of 2.37e-07.