91403660 ÷ 285 
The aim is to understand the frequency of 285 in 91403660.

Advancing to step 1:
9 divided by 285 is 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 285

Moving on to step 2:
If we divide 91 by 285, we get 0 and a remainder of 91.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 91 and we're left with 91.
Fetch the next digit (4) from the dividend, attach it to 91 and continue: 914 / 285

On to step 3:
The number 285 fits into 914 3 times, leaving a remainder of 59.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 855 away from 914, we end up with 59.
Fetch the next digit (0) from the dividend, attach it to 59 and continue: 590 / 285

Moving on to step 4:
The number 285 fits into 590 2 times, leaving a remainder of 20.
Record the quotient 2 as the next digit in the result. 
Result so far: 32.0
If we subtract 570 from 590, we get 20.
Grab the next digit (3) from the dividend, add it to 20, then carry on: 203 / 285

Step 5:
285 goes into 203 0 times with a remainder of 203.
Put 0 as the next digit of the answer. 
Result so far: 320.0
Subtracting 0 from 203 leaves us with 203.
Append the next digit (6) from the dividend to 203 and continue with: 2036 / 285

Step 6:
2036 divided by 285 is 7 with a remainder of 41.
Put 7 as the next digit of the answer. 
Result so far: 3207.0
If we subtract 1995 from 2036, we get 41.
Fetch the next digit (6) from the dividend, attach it to 41 and continue: 416 / 285

Let's proceed to step 7:
If we divide 416 by 285, we get 1 and a remainder of 131.
Put 1 as the next digit of the answer. 
Result so far: 32071.0
Subtract 285 from 416 to get 131.
Fetch the next digit (0) from the dividend, attach it to 131 and continue: 1310 / 285

Advancing to step 8:
The number 285 fits into 1310 4 times, leaving a remainder of 170.
Record the quotient 4 as the next digit in the result. 
Result so far: 320714.0
Subtract 1140 from 1310 to get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Moving on to step 9:
1700 divided by 285 is 5 with a remainder of 275.
Use 5 as the next digit of our solution. 
Result so far: 320714.5
Subtract 1425 from 1700 to get 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Let's proceed to step 10:
When dividing 2750 by 285, we get 9 with a remainder of 185.
The next digit of our result is 9. 
Result so far: 320714.59
The remainder is 185 after subtracting 2565 from 2750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Going ahead to step 11:
If we divide 1850 by 285, we get 6 and a remainder of 140.
Use 6 as the next digit of our solution. 
Result so far: 320714.596
The remainder is 140 after subtracting 1710 from 1850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Moving on to step 12:
The number 285 fits into 1400 4 times, leaving a remainder of 260.
Write down 4 as next digit of the result. 
Result so far: 320714.5964
Subtracting 1140 from 1400 leaves us with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Let's proceed to step 13:
285 can be fit into 2600 9 times, resulting in a remainder of 35.
The number 9 becomes the next digit in our result. 
Result so far: 320714.59649
Subtracting 2565 from 2600 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 14:
If we divide 350 by 285, we get 1 and a remainder of 65.
Use 1 as the next digit of our solution. 
Result so far: 320714.596491
Deduct 285 from 350 and we're left with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Going ahead to step 15:
285 goes into 650 2 times with a remainder of 80.
Put 2 as the next digit of the answer. 
Result so far: 320714.5964912
If we take 570 away from 650, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 16:
285 goes into 800 2 times with a remainder of 230.
Write down 2 as next digit of the result. 
Result so far: 320714.59649122
If we subtract 570 from 800, we get 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

After the division, we end up with 320714.59649122 and a remainder of 2.3e-07.