55164329 ÷ 398 
The aim is to understand the frequency of 398 in 55164329.

Moving on to step 1:
When dividing 5 by 398, we get 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 398

Advancing to step 2:
398 goes into 55 0 times with a remainder of 55.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 55 to get 55.
Append the next digit (1) from the dividend to 55 and continue with: 551 / 398

On to step 3:
The number 398 fits into 551 1 times, leaving a remainder of 153.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 398 from 551 to get 153.
Take the next digit (6) from the dividend and append it to 153, then repeat: 1536 / 398

Moving on to step 4:
If we divide 1536 by 398, we get 3 and a remainder of 342.
Write down 3 as next digit of the result. 
Result so far: 13.0
If we take 1194 away from 1536, we end up with 342.
Grab the next digit (4) from the dividend, add it to 342, then carry on: 3424 / 398

Let's proceed to step 5:
When dividing 3424 by 398, we get 8 with a remainder of 240.
Use 8 as the next digit of our solution. 
Result so far: 138.0
If we take 3184 away from 3424, we end up with 240.
Append the next digit (3) from the dividend to 240 and continue with: 2403 / 398

Going ahead to step 6:
398 can be fit into 2403 6 times, resulting in a remainder of 15.
Use 6 as the next digit of our solution. 
Result so far: 1386.0
If we take 2388 away from 2403, we end up with 15.
Append the next digit (2) from the dividend to 15 and continue with: 152 / 398

Moving on to step 7:
152 divided by 398 is 0 with a remainder of 152.
Use 0 as the next digit of our solution. 
Result so far: 13860.0
Deduct 0 from 152 and we're left with 152.
Include the next digit (9) from the dividend after 152, then repeat: 1529 / 398

On to step 8:
1529 divided by 398 is 3 with a remainder of 335.
Use 3 as the next digit of our solution. 
Result so far: 138603.0
If we subtract 1194 from 1529, we get 335.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3350, and continue the process.

Moving on to step 9:
When dividing 3350 by 398, we get 8 with a remainder of 166.
The next digit of our result is 8. 
Result so far: 138603.8
If we take 3184 away from 3350, we end up with 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Moving on to step 10:
398 can be fit into 1660 4 times, resulting in a remainder of 68.
Use 4 as the next digit of our solution. 
Result so far: 138603.84
Deduct 1592 from 1660 and we're left with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Going ahead to step 11:
The number 398 fits into 680 1 times, leaving a remainder of 282.
Record the quotient 1 as the next digit in the result. 
Result so far: 138603.841
If we subtract 398 from 680, we get 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Going ahead to step 12:
When dividing 2820 by 398, we get 7 with a remainder of 34.
The next digit of our result is 7. 
Result so far: 138603.8417
Deduct 2786 from 2820 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 13:
398 goes into 340 0 times with a remainder of 340.
The next digit of our result is 0. 
Result so far: 138603.8417
Subtract 0 from 340 to get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Going ahead to step 14:
When dividing 3400 by 398, we get 8 with a remainder of 216.
Record the quotient 8 as the next digit in the result. 
Result so far: 138603.841708
Subtract 3184 from 3400 to get 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

On to step 15:
When dividing 2160 by 398, we get 5 with a remainder of 170.
Write down 5 as next digit of the result. 
Result so far: 138603.8417085
Subtract 1990 from 2160 to get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Let's proceed to step 16:
398 can be fit into 1700 4 times, resulting in a remainder of 108.
Use 4 as the next digit of our solution. 
Result so far: 138603.84170854
If we take 1592 away from 1700, we end up with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

The final result is 138603.84170854 with a remainder of 1.08e-07.