Let's divide 138971 by 16
The aim is to understand the frequency of 16 in 138971.

Advancing to step 1:
The number 16 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 16

Let's proceed to step 2:
16 can be fit into 13 0 times, resulting in a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 13 to get 13.
Fetch the next digit (8) from the dividend, attach it to 13 and continue: 138 / 16

Step 3:
16 can be fit into 138 8 times, resulting in a remainder of 10.
Write down 8 as next digit of the result. 
Result so far: 8.0
Deduct 128 from 138 and we're left with 10.
Bring next digit (9) of the dividend behind the 10 and repeat the process: 109 / 16

Advancing to step 4:
If we divide 109 by 16, we get 6 and a remainder of 13.
Use 6 as the next digit of our solution. 
Result so far: 86.0
If we take 96 away from 109, we end up with 13.
Grab the next digit (7) from the dividend, add it to 13, then carry on: 137 / 16

Advancing to step 5:
If we divide 137 by 16, we get 8 and a remainder of 9.
Put 8 as the next digit of the answer. 
Result so far: 868.0
If we take 128 away from 137, we end up with 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 16

Let's proceed to step 6:
91 divided by 16 is 5 with a remainder of 11.
Record the quotient 5 as the next digit in the result. 
Result so far: 8685.0
The remainder is 11 after subtracting 80 from 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 7:
If we divide 110 by 16, we get 6 and a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 8685.6
If we take 96 away from 110, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 8:
16 can be fit into 140 8 times, resulting in a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 8685.68
Subtract 128 from 140 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 9:
16 can be fit into 120 7 times, resulting in a remainder of 8.
Use 7 as the next digit of our solution. 
Result so far: 8685.687
The remainder is 8 after subtracting 112 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 10:
When dividing 80 by 16, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 8685.6875
The remainder is 0 after subtracting 80 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 11:
0 divided by 16 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 8685.6875
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 12:
The number 16 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 8685.6875
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 8685.6875, with a leftover of 0.0.