We're dividing 66853420 by 428 
The aim is to understand the frequency of 428 in 66853420.

On to step 1:
The number 428 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 428

Step 2:
428 can be fit into 66 0 times, resulting in a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Grab the next digit (8) from the dividend, add it to 66, then carry on: 668 / 428

Moving on to step 3:
The number 428 fits into 668 1 times, leaving a remainder of 240.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 240 after subtracting 428 from 668.
Append the next digit (5) from the dividend to 240 and continue with: 2405 / 428

Advancing to step 4:
428 can be fit into 2405 5 times, resulting in a remainder of 265.
Write down 5 as next digit of the result. 
Result so far: 15.0
If we subtract 2140 from 2405, we get 265.
Fetch the next digit (3) from the dividend, attach it to 265 and continue: 2653 / 428

Moving on to step 5:
When dividing 2653 by 428, we get 6 with a remainder of 85.
Put 6 as the next digit of the answer. 
Result so far: 156.0
Subtracting 2568 from 2653 leaves us with 85.
Fetch the next digit (4) from the dividend, attach it to 85 and continue: 854 / 428

Moving on to step 6:
854 divided by 428 is 1 with a remainder of 426.
Write down 1 as next digit of the result. 
Result so far: 1561.0
Subtract 428 from 854 to get 426.
Bring next digit (2) of the dividend behind the 426 and repeat the process: 4262 / 428

On to step 7:
4262 divided by 428 is 9 with a remainder of 410.
Put 9 as the next digit of the answer. 
Result so far: 15619.0
Subtracting 3852 from 4262 leaves us with 410.
Grab the next digit (0) from the dividend, add it to 410, then carry on: 4100 / 428

Moving on to step 8:
The number 428 fits into 4100 9 times, leaving a remainder of 248.
The number 9 becomes the next digit in our result. 
Result so far: 156199.0
Subtract 3852 from 4100 to get 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

On to step 9:
The number 428 fits into 2480 5 times, leaving a remainder of 340.
Write down 5 as next digit of the result. 
Result so far: 156199.5
If we subtract 2140 from 2480, we get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Let's proceed to step 10:
If we divide 3400 by 428, we get 7 and a remainder of 404.
Write down 7 as next digit of the result. 
Result so far: 156199.57
Subtract 2996 from 3400 to get 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

On to step 11:
If we divide 4040 by 428, we get 9 and a remainder of 188.
The next digit of our result is 9. 
Result so far: 156199.579
Subtract 3852 from 4040 to get 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

Moving on to step 12:
If we divide 1880 by 428, we get 4 and a remainder of 168.
Use 4 as the next digit of our solution. 
Result so far: 156199.5794
Subtract 1712 from 1880 to 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.

Step 13:
428 goes into 1680 3 times with a remainder of 396.
Use 3 as the next digit of our solution. 
Result so far: 156199.57943
Subtracting 1284 from 1680 leaves us with 396.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

Advancing to step 14:
The number 428 fits into 3960 9 times, leaving a remainder of 108.
The next digit of our result is 9. 
Result so far: 156199.579439
The remainder is 108 after subtracting 3852 from 3960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

On to step 15:
The number 428 fits into 1080 2 times, leaving a remainder of 224.
Write down 2 as next digit of the result. 
Result so far: 156199.5794392
Subtract 856 from 1080 to get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Moving on to step 16:
428 goes into 2240 5 times with a remainder of 100.
Put 5 as the next digit of the answer. 
Result so far: 156199.57943925
Deduct 2140 from 2240 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The quotient of the division is 156199.57943925, and the remainder is 1e-07.