15572572 ÷ 804 
The aim is to understand the frequency of 804 in 15572572.

Step 1:
When dividing 1 by 804, we get 0 with 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.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 804

Going ahead to step 2:
When dividing 15 by 804, we get 0 with a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Include the next digit (5) from the dividend after 15, then repeat: 155 / 804

On to step 3:
The number 804 fits into 155 0 times, leaving a remainder of 155.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 155 after subtracting 0 from 155.
Take the next digit (7) from the dividend and append it to 155, then repeat: 1557 / 804

On to step 4:
1557 divided by 804 is 1 with a remainder of 753.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 753 after subtracting 804 from 1557.
Append the next digit (2) from the dividend to 753 and continue with: 7532 / 804

Let's proceed to step 5:
The number 804 fits into 7532 9 times, leaving a remainder of 296.
The next digit of our result is 9. 
Result so far: 19.0
If we take 7236 away from 7532, we end up with 296.
Include the next digit (5) from the dividend after 296, then repeat: 2965 / 804

Going ahead to step 6:
The number 804 fits into 2965 3 times, leaving a remainder of 553.
The number 3 becomes the next digit in our result. 
Result so far: 193.0
Deduct 2412 from 2965 and we're left with 553.
Append the next digit (7) from the dividend to 553 and continue with: 5537 / 804

On to step 7:
The number 804 fits into 5537 6 times, leaving a remainder of 713.
Record the quotient 6 as the next digit in the result. 
Result so far: 1936.0
Subtracting 4824 from 5537 leaves us with 713.
Bring next digit (2) of the dividend behind the 713 and repeat the process: 7132 / 804

Let's proceed to step 8:
When dividing 7132 by 804, we get 8 with a remainder of 700.
The next digit of our result is 8. 
Result so far: 19368.0
Subtract 6432 from 7132 to get 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

Step 9:
7000 divided by 804 is 8 with a remainder of 568.
The next digit of our result is 8. 
Result so far: 19368.8
Deduct 6432 from 7000 and we're left with 568.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5680, and continue the process.

On to step 10:
804 goes into 5680 7 times with a remainder of 52.
Put 7 as the next digit of the answer. 
Result so far: 19368.87
Subtracting 5628 from 5680 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 11:
The number 804 fits into 520 0 times, leaving a remainder of 520.
Record the quotient 0 as the next digit in the result. 
Result so far: 19368.87
If we subtract 0 from 520, we get 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Going ahead to step 12:
The number 804 fits into 5200 6 times, leaving a remainder of 376.
Write down 6 as next digit of the result. 
Result so far: 19368.8706
Subtract 4824 from 5200 to get 376.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

Let's proceed to step 13:
If we divide 3760 by 804, we get 4 and a remainder of 544.
The next digit of our result is 4. 
Result so far: 19368.87064
Subtract 3216 from 3760 to get 544.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5440, and continue the process.

On to step 14:
If we divide 5440 by 804, we get 6 and a remainder of 616.
The next digit of our result is 6. 
Result so far: 19368.870646
Deduct 4824 from 5440 and we're left with 616.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

Step 15:
If we divide 6160 by 804, we get 7 and a remainder of 532.
Use 7 as the next digit of our solution. 
Result so far: 19368.8706467
If we subtract 5628 from 6160, we get 532.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5320, and continue the process.

Step 16:
If we divide 5320 by 804, we get 6 and a remainder of 496.
Record the quotient 6 as the next digit in the result. 
Result so far: 19368.87064676
The remainder is 496 after subtracting 4824 from 5320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

The final outcome is 19368.87064676, with a leftover of 4.96e-07.