We're dividing 25881609 by 452 
The aim is to understand the frequency of 452 in 25881609.

Going ahead to step 1:
452 can be fit into 2 0 times, resulting in a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 452

Step 2:
452 can be fit into 25 0 times, resulting in a remainder of 25.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 25 after subtracting 0 from 25.
Grab the next digit (8) from the dividend, add it to 25, then carry on: 258 / 452

Step 3:
452 goes into 258 0 times with a remainder of 258.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 258 leaves us with 258.
Append the next digit (8) from the dividend to 258 and continue with: 2588 / 452

Moving on to step 4:
452 goes into 2588 5 times with a remainder of 328.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Deduct 2260 from 2588 and we're left with 328.
Bring next digit (1) of the dividend behind the 328 and repeat the process: 3281 / 452

Advancing to step 5:
If we divide 3281 by 452, we get 7 and a remainder of 117.
Use 7 as the next digit of our solution. 
Result so far: 57.0
Deduct 3164 from 3281 and we're left with 117.
Include the next digit (6) from the dividend after 117, then repeat: 1176 / 452

Going ahead to step 6:
If we divide 1176 by 452, we get 2 and a remainder of 272.
Write down 2 as next digit of the result. 
Result so far: 572.0
If we subtract 904 from 1176, we get 272.
Append the next digit (0) from the dividend to 272 and continue with: 2720 / 452

Let's proceed to step 7:
452 goes into 2720 6 times with a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 5726.0
Subtract 2712 from 2720 to get 8.
Bring next digit (9) of the dividend behind the 8 and repeat the process: 89 / 452

Going ahead to step 8:
The number 452 fits into 89 0 times, leaving a remainder of 89.
The number 0 becomes the next digit in our result. 
Result so far: 57260.0
If we subtract 0 from 89, we get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Moving on to step 9:
If we divide 890 by 452, we get 1 and a remainder of 438.
The number 1 becomes the next digit in our result. 
Result so far: 57260.1
Subtract 452 from 890 to get 438.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4380, and continue the process.

On to step 10:
When dividing 4380 by 452, we get 9 with a remainder of 312.
Record the quotient 9 as the next digit in the result. 
Result so far: 57260.19
If we subtract 4068 from 4380, we get 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

On to step 11:
452 goes into 3120 6 times with a remainder of 408.
The next digit of our result is 6. 
Result so far: 57260.196
Deduct 2712 from 3120 and we're left with 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Let's proceed to step 12:
When dividing 4080 by 452, we get 9 with a remainder of 12.
Use 9 as the next digit of our solution. 
Result so far: 57260.1969
If we take 4068 away from 4080, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 13:
452 goes into 120 0 times with a remainder of 120.
Record the quotient 0 as the next digit in the result. 
Result so far: 57260.1969
The remainder is 120 after subtracting 0 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

On to step 14:
452 can be fit into 1200 2 times, resulting in a remainder of 296.
Put 2 as the next digit of the answer. 
Result so far: 57260.196902
The remainder is 296 after subtracting 904 from 1200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Step 15:
When dividing 2960 by 452, we get 6 with a remainder of 248.
Use 6 as the next digit of our solution. 
Result so far: 57260.1969026
Deduct 2712 from 2960 and we're left with 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

On to step 16:
If we divide 2480 by 452, we get 5 and a remainder of 220.
The next digit of our result is 5. 
Result so far: 57260.19690265
Deduct 2260 from 2480 and we're left with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

After the division, we end up with 57260.19690265 and a remainder of 2.2e-07.