We look at the division of 18699495 by 398 
The aim is to understand the frequency of 398 in 18699495.

Advancing to step 1:
If we divide 1 by 398, we get 0 and a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 398

Step 2:
18 divided by 398 is 0 with a remainder of 18.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 18 and we're left with 18.
Grab the next digit (6) from the dividend, add it to 18, then carry on: 186 / 398

Moving on to step 3:
186 divided by 398 is 0 with a remainder of 186.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 186, we get 186.
Bring next digit (9) of the dividend behind the 186 and repeat the process: 1869 / 398

Advancing to step 4:
398 goes into 1869 4 times with a remainder of 277.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we take 1592 away from 1869, we end up with 277.
Take the next digit (9) from the dividend and append it to 277, then repeat: 2779 / 398

Let's proceed to step 5:
When dividing 2779 by 398, we get 6 with a remainder of 391.
Write down 6 as next digit of the result. 
Result so far: 46.0
If we take 2388 away from 2779, we end up with 391.
Append the next digit (4) from the dividend to 391 and continue with: 3914 / 398

Let's proceed to step 6:
The number 398 fits into 3914 9 times, leaving a remainder of 332.
Record the quotient 9 as the next digit in the result. 
Result so far: 469.0
Subtract 3582 from 3914 to get 332.
Include the next digit (9) from the dividend after 332, then repeat: 3329 / 398

Step 7:
If we divide 3329 by 398, we get 8 and a remainder of 145.
Put 8 as the next digit of the answer. 
Result so far: 4698.0
Subtracting 3184 from 3329 leaves us with 145.
Append the next digit (5) from the dividend to 145 and continue with: 1455 / 398

On to step 8:
When dividing 1455 by 398, we get 3 with a remainder of 261.
Put 3 as the next digit of the answer. 
Result so far: 46983.0
Subtract 1194 from 1455 to get 261.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2610, and continue the process.

Advancing to step 9:
If we divide 2610 by 398, we get 6 and a remainder of 222.
The next digit of our result is 6. 
Result so far: 46983.6
Deduct 2388 from 2610 and we're left with 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

On to step 10:
2220 divided by 398 is 5 with a remainder of 230.
The number 5 becomes the next digit in our result. 
Result so far: 46983.65
Subtract 1990 from 2220 to get 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Moving on to step 11:
The number 398 fits into 2300 5 times, leaving a remainder of 310.
The number 5 becomes the next digit in our result. 
Result so far: 46983.655
Deduct 1990 from 2300 and we're left with 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Our division results in 46983.655 with a remaining 0.031.