We look at the division of 80028457 by 781 
The aim is to understand the frequency of 781 in 80028457.

Let's proceed to step 1:
781 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 781

Going ahead to step 2:
781 goes into 80 0 times with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 80, we get 80.
Grab the next digit (0) from the dividend, add it to 80, then carry on: 800 / 781

Step 3:
The number 781 fits into 800 1 times, leaving a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 781 from 800, we get 19.
Fetch the next digit (2) from the dividend, attach it to 19 and continue: 192 / 781

Let's proceed to step 4:
When dividing 192 by 781, we get 0 with a remainder of 192.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we subtract 0 from 192, we get 192.
Take the next digit (8) from the dividend and append it to 192, then repeat: 1928 / 781

Going ahead to step 5:
If we divide 1928 by 781, we get 2 and a remainder of 366.
Write down 2 as next digit of the result. 
Result so far: 102.0
If we subtract 1562 from 1928, we get 366.
Include the next digit (4) from the dividend after 366, then repeat: 3664 / 781

Let's proceed to step 6:
781 goes into 3664 4 times with a remainder of 540.
Write down 4 as next digit of the result. 
Result so far: 1024.0
If we take 3124 away from 3664, we end up with 540.
Bring next digit (5) of the dividend behind the 540 and repeat the process: 5405 / 781

Advancing to step 7:
The number 781 fits into 5405 6 times, leaving a remainder of 719.
Put 6 as the next digit of the answer. 
Result so far: 10246.0
If we take 4686 away from 5405, we end up with 719.
Fetch the next digit (7) from the dividend, attach it to 719 and continue: 7197 / 781

On to step 8:
781 can be fit into 7197 9 times, resulting in a remainder of 168.
Put 9 as the next digit of the answer. 
Result so far: 102469.0
Deduct 7029 from 7197 and we're left with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Advancing to step 9:
If we divide 1680 by 781, we get 2 and a remainder of 118.
Record the quotient 2 as the next digit in the result. 
Result so far: 102469.2
If we subtract 1562 from 1680, we get 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Moving on to step 10:
1180 divided by 781 is 1 with a remainder of 399.
Write down 1 as next digit of the result. 
Result so far: 102469.21
If we subtract 781 from 1180, we get 399.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3990, and continue the process.

Moving on to step 11:
When dividing 3990 by 781, we get 5 with a remainder of 85.
Record the quotient 5 as the next digit in the result. 
Result so far: 102469.215
The remainder is 85 after subtracting 3905 from 3990.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

On to step 12:
If we divide 850 by 781, we get 1 and a remainder of 69.
Put 1 as the next digit of the answer. 
Result so far: 102469.2151
If we take 781 away from 850, we end up with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Step 13:
The number 781 fits into 690 0 times, leaving a remainder of 690.
Write down 0 as next digit of the result. 
Result so far: 102469.2151
If we take 0 away from 690, we end up with 690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6900, and continue the process.

On to step 14:
When dividing 6900 by 781, we get 8 with a remainder of 652.
Use 8 as the next digit of our solution. 
Result so far: 102469.215108
If we subtract 6248 from 6900, we get 652.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6520, and continue the process.

Advancing to step 15:
781 goes into 6520 8 times with a remainder of 272.
Use 8 as the next digit of our solution. 
Result so far: 102469.2151088
Subtracting 6248 from 6520 leaves us with 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

The final result is 102469.2151088 with a remainder of 2.72e-06.