15066955 divided by 428 
The aim is to understand the frequency of 428 in 15066955.

Step 1:
The number 428 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 428

Moving on to step 2:
15 divided by 428 is 0 with a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 15, we end up with 15.
Take the next digit (0) from the dividend and append it to 15, then repeat: 150 / 428

Going ahead to step 3:
150 divided by 428 is 0 with a remainder of 150.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 150 and we're left with 150.
Take the next digit (6) from the dividend and append it to 150, then repeat: 1506 / 428

Advancing to step 4:
428 can be fit into 1506 3 times, resulting in a remainder of 222.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 1284 from 1506, we get 222.
Grab the next digit (6) from the dividend, add it to 222, then carry on: 2226 / 428

Let's proceed to step 5:
428 goes into 2226 5 times with a remainder of 86.
Write down 5 as next digit of the result. 
Result so far: 35.0
Deduct 2140 from 2226 and we're left with 86.
Include the next digit (9) from the dividend after 86, then repeat: 869 / 428

Moving on to step 6:
When dividing 869 by 428, we get 2 with a remainder of 13.
Record the quotient 2 as the next digit in the result. 
Result so far: 352.0
If we subtract 856 from 869, we get 13.
Grab the next digit (5) from the dividend, add it to 13, then carry on: 135 / 428

On to step 7:
428 can be fit into 135 0 times, resulting in a remainder of 135.
Put 0 as the next digit of the answer. 
Result so far: 3520.0
Subtract 0 from 135 to get 135.
Include the next digit (5) from the dividend after 135, then repeat: 1355 / 428

Advancing to step 8:
1355 divided by 428 is 3 with a remainder of 71.
The number 3 becomes the next digit in our result. 
Result so far: 35203.0
Deduct 1284 from 1355 and we're left with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Going ahead to step 9:
If we divide 710 by 428, we get 1 and a remainder of 282.
Write down 1 as next digit of the result. 
Result so far: 35203.1
The remainder is 282 after subtracting 428 from 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Going ahead to step 10:
2820 divided by 428 is 6 with a remainder of 252.
Use 6 as the next digit of our solution. 
Result so far: 35203.16
If we take 2568 away from 2820, we end up with 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Let's proceed to step 11:
The number 428 fits into 2520 5 times, leaving a remainder of 380.
Record the quotient 5 as the next digit in the result. 
Result so far: 35203.165
Deduct 2140 from 2520 and we're left with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Step 12:
428 goes into 3800 8 times with a remainder of 376.
Use 8 as the next digit of our solution. 
Result so far: 35203.1658
The remainder is 376 after subtracting 3424 from 3800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

Moving on to step 13:
If we divide 3760 by 428, we get 8 and a remainder of 336.
The next digit of our result is 8. 
Result so far: 35203.16588
If we subtract 3424 from 3760, we get 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

The final result is 35203.16588 with a remainder of 0.000336.