15238858 ÷ 344 
The aim is to understand the frequency of 344 in 15238858.

Moving on to step 1:
If we divide 1 by 344, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 344

On to step 2:
344 can be fit into 15 0 times, resulting in a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Grab the next digit (2) from the dividend, add it to 15, then carry on: 152 / 344

Advancing to step 3:
344 can be fit into 152 0 times, resulting in a remainder of 152.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 152 after subtracting 0 from 152.
Include the next digit (3) from the dividend after 152, then repeat: 1523 / 344

Moving on to step 4:
When dividing 1523 by 344, we get 4 with a remainder of 147.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we take 1376 away from 1523, we end up with 147.
Bring next digit (8) of the dividend behind the 147 and repeat the process: 1478 / 344

Let's proceed to step 5:
If we divide 1478 by 344, we get 4 and a remainder of 102.
Put 4 as the next digit of the answer. 
Result so far: 44.0
Subtracting 1376 from 1478 leaves us with 102.
Grab the next digit (8) from the dividend, add it to 102, then carry on: 1028 / 344

On to step 6:
The number 344 fits into 1028 2 times, leaving a remainder of 340.
Use 2 as the next digit of our solution. 
Result so far: 442.0
Deduct 688 from 1028 and we're left with 340.
Fetch the next digit (5) from the dividend, attach it to 340 and continue: 3405 / 344

Step 7:
If we divide 3405 by 344, we get 9 and a remainder of 309.
Put 9 as the next digit of the answer. 
Result so far: 4429.0
The remainder is 309 after subtracting 3096 from 3405.
Grab the next digit (8) from the dividend, add it to 309, then carry on: 3098 / 344

Moving on to step 8:
344 can be fit into 3098 9 times, resulting in a remainder of 2.
Record the quotient 9 as the next digit in the result. 
Result so far: 44299.0
If we subtract 3096 from 3098, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 9:
344 can be fit into 20 0 times, resulting in a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 44299.0
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 10:
344 goes into 200 0 times with a remainder of 200.
Put 0 as the next digit of the answer. 
Result so far: 44299.0
If we subtract 0 from 200, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Our division results in 44299.0 with a remaining 0.2.