4121687 divided by 804 
The aim is to understand the frequency of 804 in 4121687.

Let's proceed to step 1:
The number 804 fits into 4 0 times, leaving a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (1) from the dividend and append it to 4, then repeat: 41 / 804

Moving on to step 2:
804 goes into 41 0 times with a remainder of 41.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 41, we get 41.
Append the next digit (2) from the dividend to 41 and continue with: 412 / 804

Step 3:
804 can be fit into 412 0 times, resulting in a remainder of 412.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 412, we end up with 412.
Append the next digit (1) from the dividend to 412 and continue with: 4121 / 804

Let's proceed to step 4:
804 can be fit into 4121 5 times, resulting in a remainder of 101.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Deduct 4020 from 4121 and we're left with 101.
Grab the next digit (6) from the dividend, add it to 101, then carry on: 1016 / 804

Let's proceed to step 5:
1016 divided by 804 is 1 with a remainder of 212.
Put 1 as the next digit of the answer. 
Result so far: 51.0
Subtracting 804 from 1016 leaves us with 212.
Take the next digit (8) from the dividend and append it to 212, then repeat: 2128 / 804

Advancing to step 6:
The number 804 fits into 2128 2 times, leaving a remainder of 520.
The number 2 becomes the next digit in our result. 
Result so far: 512.0
Subtracting 1608 from 2128 leaves us with 520.
Append the next digit (7) from the dividend to 520 and continue with: 5207 / 804

Advancing to step 7:
804 can be fit into 5207 6 times, resulting in a remainder of 383.
The number 6 becomes the next digit in our result. 
Result so far: 5126.0
The remainder is 383 after subtracting 4824 from 5207.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3830, and continue the process.

Going ahead to step 8:
3830 divided by 804 is 4 with a remainder of 614.
Use 4 as the next digit of our solution. 
Result so far: 5126.4
Subtract 3216 from 3830 to get 614.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6140, and continue the process.

Let's proceed to step 9:
When dividing 6140 by 804, we get 7 with a remainder of 512.
The next digit of our result is 7. 
Result so far: 5126.47
Deduct 5628 from 6140 and we're left with 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

Step 10:
804 goes into 5120 6 times with a remainder of 296.
Use 6 as the next digit of our solution. 
Result so far: 5126.476
Deduct 4824 from 5120 and we're left with 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Advancing to step 11:
804 can be fit into 2960 3 times, resulting in a remainder of 548.
Record the quotient 3 as the next digit in the result. 
Result so far: 5126.4763
The remainder is 548 after subtracting 2412 from 2960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5480, and continue the process.

Going ahead to step 12:
When dividing 5480 by 804, we get 6 with a remainder of 656.
Put 6 as the next digit of the answer. 
Result so far: 5126.47636
Subtracting 4824 from 5480 leaves us with 656.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6560, and continue the process.

Going ahead to step 13:
804 can be fit into 6560 8 times, resulting in a remainder of 128.
The next digit of our result is 8. 
Result so far: 5126.476368
Subtract 6432 from 6560 to get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Advancing to step 14:
The number 804 fits into 1280 1 times, leaving a remainder of 476.
The next digit of our result is 1. 
Result so far: 5126.4763681
Deduct 804 from 1280 and we're left with 476.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4760, and continue the process.

On to step 15:
When dividing 4760 by 804, we get 5 with a remainder of 740.
Put 5 as the next digit of the answer. 
Result so far: 5126.47636815
The remainder is 740 after subtracting 4020 from 4760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7400, and continue the process.

In conclusion, the division gives 5126.47636815 with a balance of 7.4e-07.