We look at the division of 91857847 by 618 
The aim is to understand the frequency of 618 in 91857847.

Step 1:
When dividing 9 by 618, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 618

Moving on to step 2:
91 divided by 618 is 0 with a remainder of 91.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 91 leaves us with 91.
Grab the next digit (8) from the dividend, add it to 91, then carry on: 918 / 618

Let's proceed to step 3:
When dividing 918 by 618, we get 1 with a remainder of 300.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 618 away from 918, we end up with 300.
Grab the next digit (5) from the dividend, add it to 300, then carry on: 3005 / 618

On to step 4:
618 can be fit into 3005 4 times, resulting in a remainder of 533.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
Deduct 2472 from 3005 and we're left with 533.
Grab the next digit (7) from the dividend, add it to 533, then carry on: 5337 / 618

Moving on to step 5:
The number 618 fits into 5337 8 times, leaving a remainder of 393.
Use 8 as the next digit of our solution. 
Result so far: 148.0
If we take 4944 away from 5337, we end up with 393.
Take the next digit (8) from the dividend and append it to 393, then repeat: 3938 / 618

Going ahead to step 6:
The number 618 fits into 3938 6 times, leaving a remainder of 230.
Write down 6 as next digit of the result. 
Result so far: 1486.0
If we subtract 3708 from 3938, we get 230.
Include the next digit (4) from the dividend after 230, then repeat: 2304 / 618

On to step 7:
The number 618 fits into 2304 3 times, leaving a remainder of 450.
The number 3 becomes the next digit in our result. 
Result so far: 14863.0
If we take 1854 away from 2304, we end up with 450.
Bring next digit (7) of the dividend behind the 450 and repeat the process: 4507 / 618

On to step 8:
618 can be fit into 4507 7 times, resulting in a remainder of 181.
Put 7 as the next digit of the answer. 
Result so far: 148637.0
If we subtract 4326 from 4507, we get 181.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1810, and continue the process.

Advancing to step 9:
1810 divided by 618 is 2 with a remainder of 574.
Use 2 as the next digit of our solution. 
Result so far: 148637.2
If we subtract 1236 from 1810, we get 574.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5740, and continue the process.

On to step 10:
618 can be fit into 5740 9 times, resulting in a remainder of 178.
Use 9 as the next digit of our solution. 
Result so far: 148637.29
The remainder is 178 after subtracting 5562 from 5740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

Moving on to step 11:
The number 618 fits into 1780 2 times, leaving a remainder of 544.
Write down 2 as next digit of the result. 
Result so far: 148637.292
Deduct 1236 from 1780 and we're left with 544.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5440, and continue the process.

Advancing to step 12:
If we divide 5440 by 618, we get 8 and a remainder of 496.
Record the quotient 8 as the next digit in the result. 
Result so far: 148637.2928
Subtracting 4944 from 5440 leaves us with 496.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

On to step 13:
When dividing 4960 by 618, we get 8 with a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 148637.29288
Deduct 4944 from 4960 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Our division results in 148637.29288 with a remaining 1.6e-05.