We're dividing 1541799 by 138 
The aim is to understand the frequency of 138 in 1541799.

Advancing to step 1:
When dividing 1 by 138, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 138

On to step 2:
15 divided by 138 is 0 with a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Append the next digit (4) from the dividend to 15 and continue with: 154 / 138

Moving on to step 3:
138 goes into 154 1 times with a remainder of 16.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 138 from 154 and we're left with 16.
Append the next digit (1) from the dividend to 16 and continue with: 161 / 138

Let's proceed to step 4:
When dividing 161 by 138, we get 1 with a remainder of 23.
The next digit of our result is 1. 
Result so far: 11.0
Subtracting 138 from 161 leaves us with 23.
Include the next digit (7) from the dividend after 23, then repeat: 237 / 138

Going ahead to step 5:
138 goes into 237 1 times with a remainder of 99.
Write down 1 as next digit of the result. 
Result so far: 111.0
Subtracting 138 from 237 leaves us with 99.
Bring next digit (9) of the dividend behind the 99 and repeat the process: 999 / 138

Let's proceed to step 6:
999 divided by 138 is 7 with a remainder of 33.
Put 7 as the next digit of the answer. 
Result so far: 1117.0
If we take 966 away from 999, we end up with 33.
Take the next digit (9) from the dividend and append it to 33, then repeat: 339 / 138

Advancing to step 7:
138 can be fit into 339 2 times, resulting in a remainder of 63.
Write down 2 as next digit of the result. 
Result so far: 11172.0
Deduct 276 from 339 and we're left with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Moving on to step 8:
If we divide 630 by 138, we get 4 and a remainder of 78.
Write down 4 as next digit of the result. 
Result so far: 11172.4
If we take 552 away from 630, we end up with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Let's proceed to step 9:
138 goes into 780 5 times with a remainder of 90.
The number 5 becomes the next digit in our result. 
Result so far: 11172.45
Deduct 690 from 780 and we're left with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Let's proceed to step 10:
The number 138 fits into 900 6 times, leaving a remainder of 72.
The number 6 becomes the next digit in our result. 
Result so far: 11172.456
Subtracting 828 from 900 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 11:
138 can be fit into 720 5 times, resulting in a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 11172.4565
The remainder is 30 after subtracting 690 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 12:
138 goes into 300 2 times with a remainder of 24.
Use 2 as the next digit of our solution. 
Result so far: 11172.45652
If we take 276 away from 300, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 13:
240 divided by 138 is 1 with a remainder of 102.
Write down 1 as next digit of the result. 
Result so far: 11172.456521
Deduct 138 from 240 and we're left with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Let's proceed to step 14:
If we divide 1020 by 138, we get 7 and a remainder of 54.
Put 7 as the next digit of the answer. 
Result so far: 11172.4565217
Deduct 966 from 1020 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 15:
138 can be fit into 540 3 times, resulting in a remainder of 126.
Write down 3 as next digit of the result. 
Result so far: 11172.45652173
If we subtract 414 from 540, we get 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

The final result is 11172.45652173 with a remainder of 1.26e-07.