We look at the division of 65537451 by 451 
The aim is to understand the frequency of 451 in 65537451.

On to step 1:
When dividing 6 by 451, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (5) from the dividend, add it to 6, then carry on: 65 / 451

Step 2:
The number 451 fits into 65 0 times, leaving a remainder of 65.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 65, we end up with 65.
Take the next digit (5) from the dividend and append it to 65, then repeat: 655 / 451

Advancing to step 3:
451 goes into 655 1 times with a remainder of 204.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 451 away from 655, we end up with 204.
Include the next digit (3) from the dividend after 204, then repeat: 2043 / 451

On to step 4:
2043 divided by 451 is 4 with a remainder of 239.
Write down 4 as next digit of the result. 
Result so far: 14.0
If we subtract 1804 from 2043, we get 239.
Bring next digit (7) of the dividend behind the 239 and repeat the process: 2397 / 451

Step 5:
451 can be fit into 2397 5 times, resulting in a remainder of 142.
The next digit of our result is 5. 
Result so far: 145.0
Subtract 2255 from 2397 to get 142.
Include the next digit (4) from the dividend after 142, then repeat: 1424 / 451

Step 6:
451 goes into 1424 3 times with a remainder of 71.
Write down 3 as next digit of the result. 
Result so far: 1453.0
Subtract 1353 from 1424 to get 71.
Append the next digit (5) from the dividend to 71 and continue with: 715 / 451

Step 7:
451 goes into 715 1 times with a remainder of 264.
Put 1 as the next digit of the answer. 
Result so far: 14531.0
Deduct 451 from 715 and we're left with 264.
Grab the next digit (1) from the dividend, add it to 264, then carry on: 2641 / 451

Moving on to step 8:
When dividing 2641 by 451, we get 5 with a remainder of 386.
The next digit of our result is 5. 
Result so far: 145315.0
The remainder is 386 after subtracting 2255 from 2641.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3860, and continue the process.

Let's proceed to step 9:
451 can be fit into 3860 8 times, resulting in a remainder of 252.
Write down 8 as next digit of the result. 
Result so far: 145315.8
Subtracting 3608 from 3860 leaves us with 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Step 10:
451 goes into 2520 5 times with a remainder of 265.
Record the quotient 5 as the next digit in the result. 
Result so far: 145315.85
If we subtract 2255 from 2520, we get 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

Moving on to step 11:
451 goes into 2650 5 times with a remainder of 395.
Put 5 as the next digit of the answer. 
Result so far: 145315.855
If we subtract 2255 from 2650, we get 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

The quotient of the division is 145315.855, and the remainder is 0.0395.