20001573 ÷ 784 
The aim is to understand the frequency of 784 in 20001573.

Let's proceed to step 1:
2 divided by 784 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 784

Let's proceed to step 2:
When dividing 20 by 784, we get 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 20, we end up with 20.
Grab the next digit (0) from the dividend, add it to 20, then carry on: 200 / 784

Moving on to step 3:
784 goes into 200 0 times with a remainder of 200.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 200 leaves us with 200.
Append the next digit (0) from the dividend to 200 and continue with: 2000 / 784

Advancing to step 4:
2000 divided by 784 is 2 with a remainder of 432.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 1568 from 2000 to get 432.
Include the next digit (1) from the dividend after 432, then repeat: 4321 / 784

Advancing to step 5:
The number 784 fits into 4321 5 times, leaving a remainder of 401.
The next digit of our result is 5. 
Result so far: 25.0
If we take 3920 away from 4321, we end up with 401.
Fetch the next digit (5) from the dividend, attach it to 401 and continue: 4015 / 784

Moving on to step 6:
If we divide 4015 by 784, we get 5 and a remainder of 95.
Record the quotient 5 as the next digit in the result. 
Result so far: 255.0
Subtract 3920 from 4015 to get 95.
Bring next digit (7) of the dividend behind the 95 and repeat the process: 957 / 784

Advancing to step 7:
When dividing 957 by 784, we get 1 with a remainder of 173.
The number 1 becomes the next digit in our result. 
Result so far: 2551.0
Deduct 784 from 957 and we're left with 173.
Include the next digit (3) from the dividend after 173, then repeat: 1733 / 784

Moving on to step 8:
If we divide 1733 by 784, we get 2 and a remainder of 165.
Use 2 as the next digit of our solution. 
Result so far: 25512.0
The remainder is 165 after subtracting 1568 from 1733.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Step 9:
If we divide 1650 by 784, we get 2 and a remainder of 82.
The next digit of our result is 2. 
Result so far: 25512.2
Subtracting 1568 from 1650 leaves us with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Moving on to step 10:
If we divide 820 by 784, we get 1 and a remainder of 36.
Put 1 as the next digit of the answer. 
Result so far: 25512.21
If we take 784 away from 820, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 11:
If we divide 360 by 784, we get 0 and a remainder of 360.
Use 0 as the next digit of our solution. 
Result so far: 25512.21
The remainder is 360 after subtracting 0 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Let's proceed to step 12:
When dividing 3600 by 784, we get 4 with a remainder of 464.
Use 4 as the next digit of our solution. 
Result so far: 25512.2104
Subtract 3136 from 3600 to get 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

Moving on to step 13:
784 goes into 4640 5 times with a remainder of 720.
The number 5 becomes the next digit in our result. 
Result so far: 25512.21045
If we subtract 3920 from 4640, we get 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

Advancing to step 14:
784 goes into 7200 9 times with a remainder of 144.
Use 9 as the next digit of our solution. 
Result so far: 25512.210459
Subtract 7056 from 7200 to get 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Moving on to step 15:
The number 784 fits into 1440 1 times, leaving a remainder of 656.
The next digit of our result is 1. 
Result so far: 25512.2104591
Deduct 784 from 1440 and we're left 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 16:
The number 784 fits into 6560 8 times, leaving a remainder of 288.
Use 8 as the next digit of our solution. 
Result so far: 25512.21045918
If we take 6272 away from 6560, we end up with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

The final outcome is 25512.21045918, with a leftover of 2.88e-07.