We look at the division of 8429510 by 604 
The aim is to understand the frequency of 604 in 8429510.

On to step 1:
If we divide 8 by 604, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (4) from the dividend after 8, then repeat: 84 / 604

Going ahead to step 2:
604 goes into 84 0 times with a remainder of 84.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 84, we get 84.
Take the next digit (2) from the dividend and append it to 84, then repeat: 842 / 604

Going ahead to step 3:
604 can be fit into 842 1 times, resulting in a remainder of 238.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 604 away from 842, we end up with 238.
Grab the next digit (9) from the dividend, add it to 238, then carry on: 2389 / 604

Let's proceed to step 4:
2389 divided by 604 is 3 with a remainder of 577.
The next digit of our result is 3. 
Result so far: 13.0
Subtracting 1812 from 2389 leaves us with 577.
Fetch the next digit (5) from the dividend, attach it to 577 and continue: 5775 / 604

Moving on to step 5:
If we divide 5775 by 604, we get 9 and a remainder of 339.
Use 9 as the next digit of our solution. 
Result so far: 139.0
Subtracting 5436 from 5775 leaves us with 339.
Append the next digit (1) from the dividend to 339 and continue with: 3391 / 604

Moving on to step 6:
3391 divided by 604 is 5 with a remainder of 371.
Record the quotient 5 as the next digit in the result. 
Result so far: 1395.0
The remainder is 371 after subtracting 3020 from 3391.
Append the next digit (0) from the dividend to 371 and continue with: 3710 / 604

Let's proceed to step 7:
604 can be fit into 3710 6 times, resulting in a remainder of 86.
Put 6 as the next digit of the answer. 
Result so far: 13956.0
The remainder is 86 after subtracting 3624 from 3710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Step 8:
If we divide 860 by 604, we get 1 and a remainder of 256.
Record the quotient 1 as the next digit in the result. 
Result so far: 13956.1
If we subtract 604 from 860, we get 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Going ahead to step 9:
The number 604 fits into 2560 4 times, leaving a remainder of 144.
Write down 4 as next digit of the result. 
Result so far: 13956.14
If we take 2416 away from 2560, we end up with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Step 10:
604 can be fit into 1440 2 times, resulting in a remainder of 232.
Put 2 as the next digit of the answer. 
Result so far: 13956.142
Subtracting 1208 from 1440 leaves us with 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Let's proceed to step 11:
The number 604 fits into 2320 3 times, leaving a remainder of 508.
Use 3 as the next digit of our solution. 
Result so far: 13956.1423
Subtracting 1812 from 2320 leaves us with 508.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

Advancing to step 12:
The number 604 fits into 5080 8 times, leaving a remainder of 248.
Put 8 as the next digit of the answer. 
Result so far: 13956.14238
Subtracting 4832 from 5080 leaves us with 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Let's proceed to step 13:
2480 divided by 604 is 4 with a remainder of 64.
Write down 4 as next digit of the result. 
Result so far: 13956.142384
If we subtract 2416 from 2480, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 14:
If we divide 640 by 604, we get 1 and a remainder of 36.
The next digit of our result is 1. 
Result so far: 13956.1423841
Subtract 604 from 640 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 15:
604 goes into 360 0 times with a remainder of 360.
Use 0 as the next digit of our solution. 
Result so far: 13956.1423841
Deduct 0 from 360 and we're left with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

The quotient of the division is 13956.1423841, and the remainder is 3.6e-07.