We're dividing 3849987 by 738 
The aim is to understand the frequency of 738 in 3849987.

Going ahead to step 1:
738 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 738

Step 2:
38 divided by 738 is 0 with a remainder of 38.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 38 leaves us with 38.
Include the next digit (4) from the dividend after 38, then repeat: 384 / 738

Step 3:
The number 738 fits into 384 0 times, leaving a remainder of 384.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 384 leaves us with 384.
Append the next digit (9) from the dividend to 384 and continue with: 3849 / 738

Going ahead to step 4:
738 can be fit into 3849 5 times, resulting in a remainder of 159.
Use 5 as the next digit of our solution. 
Result so far: 5.0
The remainder is 159 after subtracting 3690 from 3849.
Append the next digit (9) from the dividend to 159 and continue with: 1599 / 738

Moving on to step 5:
738 can be fit into 1599 2 times, resulting in a remainder of 123.
Write down 2 as next digit of the result. 
Result so far: 52.0
Deduct 1476 from 1599 and we're left with 123.
Fetch the next digit (8) from the dividend, attach it to 123 and continue: 1238 / 738

On to step 6:
The number 738 fits into 1238 1 times, leaving a remainder of 500.
Put 1 as the next digit of the answer. 
Result so far: 521.0
Deduct 738 from 1238 and we're left with 500.
Include the next digit (7) from the dividend after 500, then repeat: 5007 / 738

Step 7:
738 goes into 5007 6 times with a remainder of 579.
Record the quotient 6 as the next digit in the result. 
Result so far: 5216.0
Subtract 4428 from 5007 to get 579.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5790, and continue the process.

Advancing to step 8:
5790 divided by 738 is 7 with a remainder of 624.
Use 7 as the next digit of our solution. 
Result so far: 5216.7
If we take 5166 away from 5790, we end up with 624.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6240, and continue the process.

Let's proceed to step 9:
738 goes into 6240 8 times with a remainder of 336.
Use 8 as the next digit of our solution. 
Result so far: 5216.78
If we take 5904 away from 6240, we end up with 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

Step 10:
The number 738 fits into 3360 4 times, leaving a remainder of 408.
Write down 4 as next digit of the result. 
Result so far: 5216.784
Deduct 2952 from 3360 and we're left with 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Step 11:
738 goes into 4080 5 times with a remainder of 390.
Put 5 as the next digit of the answer. 
Result so far: 5216.7845
Subtract 3690 from 4080 to get 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Let's proceed to step 12:
If we divide 3900 by 738, we get 5 and a remainder of 210.
Write down 5 as next digit of the result. 
Result so far: 5216.78455
Deduct 3690 from 3900 and we're left with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

After the division, we end up with 5216.78455 and a remainder of 0.00021.