25222890 divided by 398 
The aim is to understand the frequency of 398 in 25222890.

Let's proceed to step 1:
The number 398 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 398

Advancing to step 2:
25 divided by 398 is 0 with a remainder of 25.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 25, we get 25.
Include the next digit (2) from the dividend after 25, then repeat: 252 / 398

Let's proceed to step 3:
When dividing 252 by 398, we get 0 with a remainder of 252.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 252 leaves us with 252.
Bring next digit (2) of the dividend behind the 252 and repeat the process: 2522 / 398

Let's proceed to step 4:
398 goes into 2522 6 times with a remainder of 134.
The next digit of our result is 6. 
Result so far: 6.0
Subtracting 2388 from 2522 leaves us with 134.
Fetch the next digit (2) from the dividend, attach it to 134 and continue: 1342 / 398

Moving on to step 5:
398 goes into 1342 3 times with a remainder of 148.
Put 3 as the next digit of the answer. 
Result so far: 63.0
If we take 1194 away from 1342, we end up with 148.
Append the next digit (8) from the dividend to 148 and continue with: 1488 / 398

Advancing to step 6:
The number 398 fits into 1488 3 times, leaving a remainder of 294.
Use 3 as the next digit of our solution. 
Result so far: 633.0
Subtracting 1194 from 1488 leaves us with 294.
Append the next digit (9) from the dividend to 294 and continue with: 2949 / 398

Let's proceed to step 7:
When dividing 2949 by 398, we get 7 with a remainder of 163.
Use 7 as the next digit of our solution. 
Result so far: 6337.0
If we subtract 2786 from 2949, we get 163.
Take the next digit (0) from the dividend and append it to 163, then repeat: 1630 / 398

Moving on to step 8:
When dividing 1630 by 398, we get 4 with a remainder of 38.
Record the quotient 4 as the next digit in the result. 
Result so far: 63374.0
The remainder is 38 after subtracting 1592 from 1630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 9:
398 goes into 380 0 times with a remainder of 380.
Write down 0 as next digit of the result. 
Result so far: 63374.0
Deduct 0 from 380 and we're left with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Going ahead to step 10:
If we divide 3800 by 398, we get 9 and a remainder of 218.
Use 9 as the next digit of our solution. 
Result so far: 63374.09
The remainder is 218 after subtracting 3582 from 3800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

Let's proceed to step 11:
The number 398 fits into 2180 5 times, leaving a remainder of 190.
The number 5 becomes the next digit in our result. 
Result so far: 63374.095
Deduct 1990 from 2180 and we're left with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

On to step 12:
If we divide 1900 by 398, we get 4 and a remainder of 308.
The next digit of our result is 4. 
Result so far: 63374.0954
If we subtract 1592 from 1900, we get 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

Advancing to step 13:
If we divide 3080 by 398, we get 7 and a remainder of 294.
The next digit of our result is 7. 
Result so far: 63374.09547
If we subtract 2786 from 3080, we get 294.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

Let's proceed to step 14:
398 goes into 2940 7 times with a remainder of 154.
Write down 7 as next digit of the result. 
Result so far: 63374.095477
Deduct 2786 from 2940 and we're left with 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

After the division, we end up with 63374.095477 and a remainder of 1.54e-05.