We divide 25285664 by 641
The aim is to understand the frequency of 641 in 25285664.

Going ahead to step 1:
The number 641 fits into 2 0 times, leaving a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 641

Going ahead to step 2:
641 goes into 25 0 times with a remainder of 25.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 25 to get 25.
Append the next digit (2) from the dividend to 25 and continue with: 252 / 641

Advancing to step 3:
641 can be fit into 252 0 times, resulting in a remainder of 252.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 252 and we're left with 252.
Grab the next digit (8) from the dividend, add it to 252, then carry on: 2528 / 641

Step 4:
641 goes into 2528 3 times with a remainder of 605.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 1923 from 2528, we get 605.
Bring next digit (5) of the dividend behind the 605 and repeat the process: 6055 / 641

Step 5:
641 goes into 6055 9 times with a remainder of 286.
Use 9 as the next digit of our solution. 
Result so far: 39.0
If we subtract 5769 from 6055, we get 286.
Append the next digit (6) from the dividend to 286 and continue with: 2866 / 641

On to step 6:
If we divide 2866 by 641, we get 4 and a remainder of 302.
The number 4 becomes the next digit in our result. 
Result so far: 394.0
The remainder is 302 after subtracting 2564 from 2866.
Take the next digit (6) from the dividend and append it to 302, then repeat: 3026 / 641

On to step 7:
641 can be fit into 3026 4 times, resulting in a remainder of 462.
Put 4 as the next digit of the answer. 
Result so far: 3944.0
If we take 2564 away from 3026, we end up with 462.
Include the next digit (4) from the dividend after 462, then repeat: 4624 / 641

Let's proceed to step 8:
The number 641 fits into 4624 7 times, leaving a remainder of 137.
The next digit of our result is 7. 
Result so far: 39447.0
The remainder is 137 after subtracting 4487 from 4624.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

On to step 9:
1370 divided by 641 is 2 with a remainder of 88.
The next digit of our result is 2. 
Result so far: 39447.2
Deduct 1282 from 1370 and we're left with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Step 10:
641 can be fit into 880 1 times, resulting in a remainder of 239.
Use 1 as the next digit of our solution. 
Result so far: 39447.21
The remainder is 239 after subtracting 641 from 880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

Step 11:
The number 641 fits into 2390 3 times, leaving a remainder of 467.
Record the quotient 3 as the next digit in the result. 
Result so far: 39447.213
Subtracting 1923 from 2390 leaves us with 467.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4670, and continue the process.

Moving on to step 12:
When dividing 4670 by 641, we get 7 with a remainder of 183.
The number 7 becomes the next digit in our result. 
Result so far: 39447.2137
Deduct 4487 from 4670 and we're left with 183.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1830, and continue the process.

Let's proceed to step 13:
The number 641 fits into 1830 2 times, leaving a remainder of 548.
The number 2 becomes the next digit in our result. 
Result so far: 39447.21372
If we take 1282 away from 1830, we end up with 548.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5480, and continue the process.

Step 14:
641 can be fit into 5480 8 times, resulting in a remainder of 352.
The next digit of our result is 8. 
Result so far: 39447.213728
If we subtract 5128 from 5480, we get 352.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

Advancing to step 15:
If we divide 3520 by 641, we get 5 and a remainder of 315.
Record the quotient 5 as the next digit in the result. 
Result so far: 39447.2137285
The remainder is 315 after subtracting 3205 from 3520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Going ahead to step 16:
When dividing 3150 by 641, we get 4 with a remainder of 586.
The number 4 becomes the next digit in our result. 
Result so far: 39447.21372854
Subtract 2564 from 3150 to get 586.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5860, and continue the process.

The final outcome is 39447.21372854, with a leftover of 5.86e-07.