Let's divide 91720250 by 511
The aim is to understand the frequency of 511 in 91720250.

Going ahead to step 1:
When dividing 9 by 511, we get 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 511

On to step 2:
When dividing 91 by 511, we get 0 with a remainder of 91.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 91 and we're left with 91.
Bring next digit (7) of the dividend behind the 91 and repeat the process: 917 / 511

Step 3:
The number 511 fits into 917 1 times, leaving a remainder of 406.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 511 from 917 and we're left with 406.
Take the next digit (2) from the dividend and append it to 406, then repeat: 4062 / 511

Moving on to step 4:
The number 511 fits into 4062 7 times, leaving a remainder of 485.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
Subtract 3577 from 4062 to get 485.
Append the next digit (0) from the dividend to 485 and continue with: 4850 / 511

Moving on to step 5:
If we divide 4850 by 511, we get 9 and a remainder of 251.
The number 9 becomes the next digit in our result. 
Result so far: 179.0
Subtract 4599 from 4850 to get 251.
Include the next digit (2) from the dividend after 251, then repeat: 2512 / 511

On to step 6:
When dividing 2512 by 511, we get 4 with a remainder of 468.
Use 4 as the next digit of our solution. 
Result so far: 1794.0
Subtract 2044 from 2512 to get 468.
Bring next digit (5) of the dividend behind the 468 and repeat the process: 4685 / 511

Going ahead to step 7:
511 goes into 4685 9 times with a remainder of 86.
Write down 9 as next digit of the result. 
Result so far: 17949.0
The remainder is 86 after subtracting 4599 from 4685.
Take the next digit (0) from the dividend and append it to 86, then repeat: 860 / 511

Let's proceed to step 8:
The number 511 fits into 860 1 times, leaving a remainder of 349.
Write down 1 as next digit of the result. 
Result so far: 179491.0
If we subtract 511 from 860, we get 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

On to step 9:
If we divide 3490 by 511, we get 6 and a remainder of 424.
The next digit of our result is 6. 
Result so far: 179491.6
If we take 3066 away from 3490, we end up with 424.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

Step 10:
511 can be fit into 4240 8 times, resulting in a remainder of 152.
Write down 8 as next digit of the result. 
Result so far: 179491.68
The remainder is 152 after subtracting 4088 from 4240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Going ahead to step 11:
511 can be fit into 1520 2 times, resulting in a remainder of 498.
Record the quotient 2 as the next digit in the result. 
Result so far: 179491.682
Subtract 1022 from 1520 to get 498.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4980, and continue the process.

Advancing to step 12:
The number 511 fits into 4980 9 times, leaving a remainder of 381.
Use 9 as the next digit of our solution. 
Result so far: 179491.6829
Subtract 4599 from 4980 to get 381.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3810, and continue the process.

Moving on to step 13:
When dividing 3810 by 511, we get 7 with a remainder of 233.
The number 7 becomes the next digit in our result. 
Result so far: 179491.68297
If we subtract 3577 from 3810, we get 233.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2330, and continue the process.

Advancing to step 14:
2330 divided by 511 is 4 with a remainder of 286.
Write down 4 as next digit of the result. 
Result so far: 179491.682974
If we subtract 2044 from 2330, we get 286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

Let's proceed to step 15:
The number 511 fits into 2860 5 times, leaving a remainder of 305.
Put 5 as the next digit of the answer. 
Result so far: 179491.6829745
The remainder is 305 after subtracting 2555 from 2860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Step 16:
3050 divided by 511 is 5 with a remainder of 495.
Use 5 as the next digit of our solution. 
Result so far: 179491.68297455
If we take 2555 away from 3050, we end up with 495.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4950, and continue the process.

The quotient of the division is 179491.68297455, and the remainder is 4.95e-07.