Let's divide 20958576 by 618
The aim is to understand the frequency of 618 in 20958576.

On to step 1:
618 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 618

Going ahead to step 2:
When dividing 20 by 618, we get 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 20 after subtracting 0 from 20.
Take the next digit (9) from the dividend and append it to 20, then repeat: 209 / 618

Let's proceed to step 3:
If we divide 209 by 618, we get 0 and a remainder of 209.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 209 after subtracting 0 from 209.
Append the next digit (5) from the dividend to 209 and continue with: 2095 / 618

Advancing to step 4:
The number 618 fits into 2095 3 times, leaving a remainder of 241.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 1854 from 2095 leaves us with 241.
Take the next digit (8) from the dividend and append it to 241, then repeat: 2418 / 618

Step 5:
When dividing 2418 by 618, we get 3 with a remainder of 564.
Record the quotient 3 as the next digit in the result. 
Result so far: 33.0
Deduct 1854 from 2418 and we're left with 564.
Grab the next digit (5) from the dividend, add it to 564, then carry on: 5645 / 618

Advancing to step 6:
618 can be fit into 5645 9 times, resulting in a remainder of 83.
Write down 9 as next digit of the result. 
Result so far: 339.0
The remainder is 83 after subtracting 5562 from 5645.
Grab the next digit (7) from the dividend, add it to 83, then carry on: 837 / 618

Moving on to step 7:
837 divided by 618 is 1 with a remainder of 219.
The number 1 becomes the next digit in our result. 
Result so far: 3391.0
Deduct 618 from 837 and we're left with 219.
Take the next digit (6) from the dividend and append it to 219, then repeat: 2196 / 618

Advancing to step 8:
If we divide 2196 by 618, we get 3 and a remainder of 342.
Record the quotient 3 as the next digit in the result. 
Result so far: 33913.0
Deduct 1854 from 2196 and we're left with 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

Moving on to step 9:
3420 divided by 618 is 5 with a remainder of 330.
Use 5 as the next digit of our solution. 
Result so far: 33913.5
Subtract 3090 from 3420 to get 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Let's proceed to step 10:
618 can be fit into 3300 5 times, resulting in a remainder of 210.
The number 5 becomes the next digit in our result. 
Result so far: 33913.55
If we subtract 3090 from 3300, we get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Our division results in 33913.55 with a remaining 0.21.