We're dividing 12678858 by 353 
The aim is to understand the frequency of 353 in 12678858.

Step 1:
When dividing 1 by 353, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 353

On to step 2:
The number 353 fits into 12 0 times, leaving a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Include the next digit (6) from the dividend after 12, then repeat: 126 / 353

Let's proceed to step 3:
The number 353 fits into 126 0 times, leaving a remainder of 126.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 126 after subtracting 0 from 126.
Take the next digit (7) from the dividend and append it to 126, then repeat: 1267 / 353

Going ahead to step 4:
The number 353 fits into 1267 3 times, leaving a remainder of 208.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 1059 from 1267 leaves us with 208.
Bring next digit (8) of the dividend behind the 208 and repeat the process: 2088 / 353

Moving on to step 5:
If we divide 2088 by 353, we get 5 and a remainder of 323.
Write down 5 as next digit of the result. 
Result so far: 35.0
The remainder is 323 after subtracting 1765 from 2088.
Bring next digit (8) of the dividend behind the 323 and repeat the process: 3238 / 353

Moving on to step 6:
3238 divided by 353 is 9 with a remainder of 61.
The number 9 becomes the next digit in our result. 
Result so far: 359.0
Subtracting 3177 from 3238 leaves us with 61.
Append the next digit (5) from the dividend to 61 and continue with: 615 / 353

On to step 7:
If we divide 615 by 353, we get 1 and a remainder of 262.
The next digit of our result is 1. 
Result so far: 3591.0
The remainder is 262 after subtracting 353 from 615.
Bring next digit (8) of the dividend behind the 262 and repeat the process: 2628 / 353

Let's proceed to step 8:
If we divide 2628 by 353, we get 7 and a remainder of 157.
Write down 7 as next digit of the result. 
Result so far: 35917.0
The remainder is 157 after subtracting 2471 from 2628.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1570, and continue the process.

Going ahead to step 9:
1570 divided by 353 is 4 with a remainder of 158.
Write down 4 as next digit of the result. 
Result so far: 35917.4
The remainder is 158 after subtracting 1412 from 1570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

On to step 10:
If we divide 1580 by 353, we get 4 and a remainder of 168.
Put 4 as the next digit of the answer. 
Result so far: 35917.44
If we subtract 1412 from 1580, we get 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Our division results in 35917.44 with a remaining 0.168.