We look at the division of 25630083 by 891 
The aim is to understand the frequency of 891 in 25630083.

Step 1:
The number 891 fits into 2 0 times, leaving a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 891

On to step 2:
When dividing 25 by 891, we get 0 with a remainder of 25.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 25, we end up with 25.
Grab the next digit (6) from the dividend, add it to 25, then carry on: 256 / 891

Going ahead to step 3:
If we divide 256 by 891, we get 0 and a remainder of 256.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 256, we get 256.
Include the next digit (3) from the dividend after 256, then repeat: 2563 / 891

On to step 4:
If we divide 2563 by 891, we get 2 and a remainder of 781.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 1782 from 2563 to get 781.
Grab the next digit (0) from the dividend, add it to 781, then carry on: 7810 / 891

Advancing to step 5:
7810 divided by 891 is 8 with a remainder of 682.
Record the quotient 8 as the next digit in the result. 
Result so far: 28.0
Subtract 7128 from 7810 to get 682.
Fetch the next digit (0) from the dividend, attach it to 682 and continue: 6820 / 891

Going ahead to step 6:
891 can be fit into 6820 7 times, resulting in a remainder of 583.
Record the quotient 7 as the next digit in the result. 
Result so far: 287.0
The remainder is 583 after subtracting 6237 from 6820.
Append the next digit (8) from the dividend to 583 and continue with: 5838 / 891

Let's proceed to step 7:
The number 891 fits into 5838 6 times, leaving a remainder of 492.
Put 6 as the next digit of the answer. 
Result so far: 2876.0
The remainder is 492 after subtracting 5346 from 5838.
Bring next digit (3) of the dividend behind the 492 and repeat the process: 4923 / 891

Step 8:
The number 891 fits into 4923 5 times, leaving a remainder of 468.
Write down 5 as next digit of the result. 
Result so far: 28765.0
If we subtract 4455 from 4923, we get 468.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4680, and continue the process.

Advancing to step 9:
891 can be fit into 4680 5 times, resulting in a remainder of 225.
Write down 5 as next digit of the result. 
Result so far: 28765.5
If we subtract 4455 from 4680, we get 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Let's proceed to step 10:
The number 891 fits into 2250 2 times, leaving a remainder of 468.
The number 2 becomes the next digit in our result. 
Result so far: 28765.52
If we take 1782 away from 2250, we end up with 468.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4680, and continue the process.

Advancing to step 11:
When dividing 4680 by 891, we get 5 with a remainder of 225.
Put 5 as the next digit of the answer. 
Result so far: 28765.525
Subtract 4455 from 4680 to get 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Step 12:
891 goes into 2250 2 times with a remainder of 468.
Put 2 as the next digit of the answer. 
Result so far: 28765.5252
The remainder is 468 after subtracting 1782 from 2250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4680, and continue the process.

Going ahead to step 13:
4680 divided by 891 is 5 with a remainder of 225.
Write down 5 as next digit of the result. 
Result so far: 28765.52525
Subtract 4455 from 4680 to get 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Step 14:
891 can be fit into 2250 2 times, resulting in a remainder of 468.
The next digit of our result is 2. 
Result so far: 28765.525252
Subtract 1782 from 2250 to get 468.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4680, and continue the process.

On to step 15:
891 can be fit into 4680 5 times, resulting in a remainder of 225.
Use 5 as the next digit of our solution. 
Result so far: 28765.5252525
Subtracting 4455 from 4680 leaves us with 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

On to step 16:
When dividing 2250 by 891, we get 2 with a remainder of 468.
Use 2 as the next digit of our solution. 
Result so far: 28765.52525252
Deduct 1782 from 2250 and we're left with 468.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4680, and continue the process.

The final outcome is 28765.52525252, with a leftover of 4.68e-07.