81033959 ÷ 604 
The aim is to understand the frequency of 604 in 81033959.

Advancing to step 1:
8 divided by 604 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 604

Moving on to step 2:
604 goes into 81 0 times with a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Include the next digit (0) from the dividend after 81, then repeat: 810 / 604

Let's proceed to step 3:
810 divided by 604 is 1 with a remainder of 206.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 604 away from 810, we end up with 206.
Grab the next digit (3) from the dividend, add it to 206, then carry on: 2063 / 604

Going ahead to step 4:
2063 divided by 604 is 3 with a remainder of 251.
The next digit of our result is 3. 
Result so far: 13.0
Deduct 1812 from 2063 and we're left with 251.
Take the next digit (3) from the dividend and append it to 251, then repeat: 2513 / 604

Going ahead to step 5:
When dividing 2513 by 604, we get 4 with a remainder of 97.
Put 4 as the next digit of the answer. 
Result so far: 134.0
If we subtract 2416 from 2513, we get 97.
Fetch the next digit (9) from the dividend, attach it to 97 and continue: 979 / 604

Moving on to step 6:
604 can be fit into 979 1 times, resulting in a remainder of 375.
Write down 1 as next digit of the result. 
Result so far: 1341.0
The remainder is 375 after subtracting 604 from 979.
Grab the next digit (5) from the dividend, add it to 375, then carry on: 3755 / 604

Advancing to step 7:
604 can be fit into 3755 6 times, resulting in a remainder of 131.
Use 6 as the next digit of our solution. 
Result so far: 13416.0
Subtract 3624 from 3755 to get 131.
Fetch the next digit (9) from the dividend, attach it to 131 and continue: 1319 / 604

Going ahead to step 8:
When dividing 1319 by 604, we get 2 with a remainder of 111.
Use 2 as the next digit of our solution. 
Result so far: 134162.0
Subtracting 1208 from 1319 leaves us with 111.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Step 9:
When dividing 1110 by 604, we get 1 with a remainder of 506.
The next digit of our result is 1. 
Result so far: 134162.1
Subtract 604 from 1110 to get 506.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5060, and continue the process.

Moving on to step 10:
604 can be fit into 5060 8 times, resulting in a remainder of 228.
The next digit of our result is 8. 
Result so far: 134162.18
Subtract 4832 from 5060 to get 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Let's proceed to step 11:
If we divide 2280 by 604, we get 3 and a remainder of 468.
Write down 3 as next digit of the result. 
Result so far: 134162.183
Deduct 1812 from 2280 and we're left with 468.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4680, and continue the process.

Advancing to step 12:
604 can be fit into 4680 7 times, resulting in a remainder of 452.
Write down 7 as next digit of the result. 
Result so far: 134162.1837
Subtract 4228 from 4680 to get 452.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4520, and continue the process.

Step 13:
The number 604 fits into 4520 7 times, leaving a remainder of 292.
Write down 7 as next digit of the result. 
Result so far: 134162.18377
Subtracting 4228 from 4520 leaves us with 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

The quotient of the division is 134162.18377, and the remainder is 0.000292.