91763944 ÷ 525 
The aim is to understand the frequency of 525 in 91763944.

Step 1:
If we divide 9 by 525, we get 0 and a remainder of 9.
Write down 0 as next digit of the 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 / 525

Advancing to step 2:
If we divide 91 by 525, we get 0 and a remainder of 91.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 91, we get 91.
Grab the next digit (7) from the dividend, add it to 91, then carry on: 917 / 525

Step 3:
917 divided by 525 is 1 with a remainder of 392.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 525 from 917, we get 392.
Append the next digit (6) from the dividend to 392 and continue with: 3926 / 525

Advancing to step 4:
If we divide 3926 by 525, we get 7 and a remainder of 251.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
If we take 3675 away from 3926, we end up with 251.
Append the next digit (3) from the dividend to 251 and continue with: 2513 / 525

Let's proceed to step 5:
The number 525 fits into 2513 4 times, leaving a remainder of 413.
The next digit of our result is 4. 
Result so far: 174.0
Subtract 2100 from 2513 to get 413.
Take the next digit (9) from the dividend and append it to 413, then repeat: 4139 / 525

Going ahead to step 6:
525 goes into 4139 7 times with a remainder of 464.
Write down 7 as next digit of the result. 
Result so far: 1747.0
If we take 3675 away from 4139, we end up with 464.
Bring next digit (4) of the dividend behind the 464 and repeat the process: 4644 / 525

Step 7:
The number 525 fits into 4644 8 times, leaving a remainder of 444.
The next digit of our result is 8. 
Result so far: 17478.0
If we take 4200 away from 4644, we end up with 444.
Take the next digit (4) from the dividend and append it to 444, then repeat: 4444 / 525

On to step 8:
525 goes into 4444 8 times with a remainder of 244.
Write down 8 as next digit of the result. 
Result so far: 174788.0
The remainder is 244 after subtracting 4200 from 4444.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Step 9:
If we divide 2440 by 525, we get 4 and a remainder of 340.
Use 4 as the next digit of our solution. 
Result so far: 174788.4
If we subtract 2100 from 2440, we get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Moving on to step 10:
3400 divided by 525 is 6 with a remainder of 250.
Put 6 as the next digit of the answer. 
Result so far: 174788.46
The remainder is 250 after subtracting 3150 from 3400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Moving on to step 11:
525 can be fit into 2500 4 times, resulting in a remainder of 400.
Write down 4 as next digit of the result. 
Result so far: 174788.464
Subtracting 2100 from 2500 leaves us with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Going ahead to step 12:
When dividing 4000 by 525, we get 7 with a remainder of 325.
Put 7 as the next digit of the answer. 
Result so far: 174788.4647
Deduct 3675 from 4000 and we're left with 325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

Advancing to step 13:
525 goes into 3250 6 times with a remainder of 100.
The number 6 becomes the next digit in our result. 
Result so far: 174788.46476
Subtracting 3150 from 3250 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Advancing to step 14:
When dividing 1000 by 525, we get 1 with a remainder of 475.
The number 1 becomes the next digit in our result. 
Result so far: 174788.464761
Subtracting 525 from 1000 leaves us with 475.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4750, and continue the process.

Let's proceed to step 15:
If we divide 4750 by 525, we get 9 and a remainder of 25.
The next digit of our result is 9. 
Result so far: 174788.4647619
If we take 4725 away from 4750, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 16:
The number 525 fits into 250 0 times, leaving a remainder of 250.
The next digit of our result is 0. 
Result so far: 174788.4647619
If we subtract 0 from 250, we get 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Our division results in 174788.4647619 with a remaining 2.5e-07.