We look at the division of 45102981 by 357 
The aim is to understand the frequency of 357 in 45102981.

Let's proceed to step 1:
357 can be fit into 4 0 times, resulting in a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 357

Going ahead to step 2:
The number 357 fits into 45 0 times, leaving a remainder of 45.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 45 leaves us with 45.
Append the next digit (1) from the dividend to 45 and continue with: 451 / 357

Step 3:
357 goes into 451 1 times with a remainder of 94.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 357 from 451 and we're left with 94.
Grab the next digit (0) from the dividend, add it to 94, then carry on: 940 / 357

Let's proceed to step 4:
When dividing 940 by 357, we get 2 with a remainder of 226.
The next digit of our result is 2. 
Result so far: 12.0
Subtract 714 from 940 to get 226.
Take the next digit (2) from the dividend and append it to 226, then repeat: 2262 / 357

On to step 5:
357 goes into 2262 6 times with a remainder of 120.
Use 6 as the next digit of our solution. 
Result so far: 126.0
If we take 2142 away from 2262, we end up with 120.
Append the next digit (9) from the dividend to 120 and continue with: 1209 / 357

Going ahead to step 6:
If we divide 1209 by 357, we get 3 and a remainder of 138.
The number 3 becomes the next digit in our result. 
Result so far: 1263.0
If we subtract 1071 from 1209, we get 138.
Grab the next digit (8) from the dividend, add it to 138, then carry on: 1388 / 357

On to step 7:
357 goes into 1388 3 times with a remainder of 317.
The next digit of our result is 3. 
Result so far: 12633.0
Deduct 1071 from 1388 and we're left with 317.
Fetch the next digit (1) from the dividend, attach it to 317 and continue: 3171 / 357

Moving on to step 8:
3171 divided by 357 is 8 with a remainder of 315.
The next digit of our result is 8. 
Result so far: 126338.0
Deduct 2856 from 3171 and we're left with 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Advancing to step 9:
357 goes into 3150 8 times with a remainder of 294.
Record the quotient 8 as the next digit in the result. 
Result so far: 126338.8
Subtract 2856 from 3150 to get 294.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

Advancing to step 10:
The number 357 fits into 2940 8 times, leaving a remainder of 84.
Write down 8 as next digit of the result. 
Result so far: 126338.88
Subtract 2856 from 2940 to get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

The final outcome is 126338.88, with a leftover of 0.084.