We look at the division of 8915501 by 523 
The aim is to understand the frequency of 523 in 8915501.

Going ahead to step 1:
The number 523 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Fetch the next digit (9) from the dividend, attach it to 8 and continue: 89 / 523

Moving on to step 2:
523 can be fit into 89 0 times, resulting in a remainder of 89.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 89, we get 89.
Fetch the next digit (1) from the dividend, attach it to 89 and continue: 891 / 523

Step 3:
891 divided by 523 is 1 with a remainder of 368.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 523 from 891 and we're left with 368.
Grab the next digit (5) from the dividend, add it to 368, then carry on: 3685 / 523

Moving on to step 4:
If we divide 3685 by 523, we get 7 and a remainder of 24.
Write down 7 as next digit of the result. 
Result so far: 17.0
Subtracting 3661 from 3685 leaves us with 24.
Grab the next digit (5) from the dividend, add it to 24, then carry on: 245 / 523

Going ahead to step 5:
245 divided by 523 is 0 with a remainder of 245.
The next digit of our result is 0. 
Result so far: 170.0
Subtract 0 from 245 to get 245.
Fetch the next digit (0) from the dividend, attach it to 245 and continue: 2450 / 523

Step 6:
If we divide 2450 by 523, we get 4 and a remainder of 358.
The number 4 becomes the next digit in our result. 
Result so far: 1704.0
If we take 2092 away from 2450, we end up with 358.
Take the next digit (1) from the dividend and append it to 358, then repeat: 3581 / 523

Moving on to step 7:
If we divide 3581 by 523, we get 6 and a remainder of 443.
Use 6 as the next digit of our solution. 
Result so far: 17046.0
Subtracting 3138 from 3581 leaves us with 443.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4430, and continue the process.

Step 8:
The number 523 fits into 4430 8 times, leaving a remainder of 246.
The number 8 becomes the next digit in our result. 
Result so far: 17046.8
The remainder is 246 after subtracting 4184 from 4430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

On to step 9:
When dividing 2460 by 523, we get 4 with a remainder of 368.
Record the quotient 4 as the next digit in the result. 
Result so far: 17046.84
If we take 2092 away from 2460, we end up with 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

Advancing to step 10:
When dividing 3680 by 523, we get 7 with a remainder of 19.
Put 7 as the next digit of the answer. 
Result so far: 17046.847
Subtracting 3661 from 3680 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 11:
523 can be fit into 190 0 times, resulting in a remainder of 190.
Record the quotient 0 as the next digit in the result. 
Result so far: 17046.847
Subtracting 0 from 190 leaves us with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

On to step 12:
When dividing 1900 by 523, we get 3 with a remainder of 331.
Record the quotient 3 as the next digit in the result. 
Result so far: 17046.84703
Subtract 1569 from 1900 to get 331.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

Let's proceed to step 13:
523 can be fit into 3310 6 times, resulting in a remainder of 172.
Write down 6 as next digit of the result. 
Result so far: 17046.847036
Deduct 3138 from 3310 and we're left with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Going ahead to step 14:
1720 divided by 523 is 3 with a remainder of 151.
Record the quotient 3 as the next digit in the result. 
Result so far: 17046.8470363
Subtracting 1569 from 1720 leaves us with 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

Advancing to step 15:
The number 523 fits into 1510 2 times, leaving a remainder of 464.
The number 2 becomes the next digit in our result. 
Result so far: 17046.84703632
Deduct 1046 from 1510 and we're left with 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

Our division results in 17046.84703632 with a remaining 4.64e-07.