Let's divide 72857761 by 835
The aim is to understand the frequency of 835 in 72857761.

On to step 1:
7 divided by 835 is 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Take the next digit (2) from the dividend and append it to 7, then repeat: 72 / 835

Moving on to step 2:
835 can be fit into 72 0 times, resulting in a remainder of 72.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 72, we end up with 72.
Bring next digit (8) of the dividend behind the 72 and repeat the process: 728 / 835

Going ahead to step 3:
835 goes into 728 0 times with a remainder of 728.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 728 leaves us with 728.
Bring next digit (5) of the dividend behind the 728 and repeat the process: 7285 / 835

Advancing to step 4:
If we divide 7285 by 835, we get 8 and a remainder of 605.
Put 8 as the next digit of the answer. 
Result so far: 8.0
The remainder is 605 after subtracting 6680 from 7285.
Append the next digit (7) from the dividend to 605 and continue with: 6057 / 835

Going ahead to step 5:
When dividing 6057 by 835, we get 7 with a remainder of 212.
Record the quotient 7 as the next digit in the result. 
Result so far: 87.0
If we take 5845 away from 6057, we end up with 212.
Grab the next digit (7) from the dividend, add it to 212, then carry on: 2127 / 835

Let's proceed to step 6:
If we divide 2127 by 835, we get 2 and a remainder of 457.
Write down 2 as next digit of the result. 
Result so far: 872.0
Subtract 1670 from 2127 to get 457.
Bring next digit (6) of the dividend behind the 457 and repeat the process: 4576 / 835

Step 7:
The number 835 fits into 4576 5 times, leaving a remainder of 401.
The next digit of our result is 5. 
Result so far: 8725.0
Subtract 4175 from 4576 to get 401.
Include the next digit (1) from the dividend after 401, then repeat: 4011 / 835

Step 8:
When dividing 4011 by 835, we get 4 with a remainder of 671.
Record the quotient 4 as the next digit in the result. 
Result so far: 87254.0
Subtract 3340 from 4011 to get 671.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6710, and continue the process.

On to step 9:
835 can be fit into 6710 8 times, resulting in a remainder of 30.
Put 8 as the next digit of the answer. 
Result so far: 87254.8
Deduct 6680 from 6710 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 10:
When dividing 300 by 835, we get 0 with a remainder of 300.
Write down 0 as next digit of the result. 
Result so far: 87254.8
If we subtract 0 from 300, we get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

On to step 11:
When dividing 3000 by 835, we get 3 with a remainder of 495.
The next digit of our result is 3. 
Result so far: 87254.803
If we subtract 2505 from 3000, we get 495.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4950, and continue the process.

Going ahead to step 12:
If we divide 4950 by 835, we get 5 and a remainder of 775.
Put 5 as the next digit of the answer. 
Result so far: 87254.8035
The remainder is 775 after subtracting 4175 from 4950.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7750, and continue the process.

Moving on to step 13:
835 can be fit into 7750 9 times, resulting in a remainder of 235.
Write down 9 as next digit of the result. 
Result so far: 87254.80359
Subtract 7515 from 7750 to get 235.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

Step 14:
835 can be fit into 2350 2 times, resulting in a remainder of 680.
Use 2 as the next digit of our solution. 
Result so far: 87254.803592
The remainder is 680 after subtracting 1670 from 2350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

Advancing to step 15:
835 goes into 6800 8 times with a remainder of 120.
The next digit of our result is 8. 
Result so far: 87254.8035928
Deduct 6680 from 6800 and we're left with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 16:
835 can be fit into 1200 1 times, resulting in a remainder of 365.
The next digit of our result is 1. 
Result so far: 87254.80359281
Deduct 835 from 1200 and we're left with 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

After the division, we end up with 87254.80359281 and a remainder of 3.65e-07.