We look at the division of 13121893 by 392 
The aim is to understand the frequency of 392 in 13121893.

Moving on to step 1:
392 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 392

On to step 2:
13 divided by 392 is 0 with a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 13 and we're left with 13.
Take the next digit (1) from the dividend and append it to 13, then repeat: 131 / 392

Going ahead to step 3:
392 can be fit into 131 0 times, resulting in a remainder of 131.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 131 and we're left with 131.
Append the next digit (2) from the dividend to 131 and continue with: 1312 / 392

On to step 4:
The number 392 fits into 1312 3 times, leaving a remainder of 136.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtract 1176 from 1312 to get 136.
Include the next digit (1) from the dividend after 136, then repeat: 1361 / 392

Advancing to step 5:
If we divide 1361 by 392, we get 3 and a remainder of 185.
The number 3 becomes the next digit in our result. 
Result so far: 33.0
If we take 1176 away from 1361, we end up with 185.
Take the next digit (8) from the dividend and append it to 185, then repeat: 1858 / 392

Step 6:
If we divide 1858 by 392, we get 4 and a remainder of 290.
The next digit of our result is 4. 
Result so far: 334.0
Deduct 1568 from 1858 and we're left with 290.
Fetch the next digit (9) from the dividend, attach it to 290 and continue: 2909 / 392

Moving on to step 7:
If we divide 2909 by 392, we get 7 and a remainder of 165.
The next digit of our result is 7. 
Result so far: 3347.0
Subtracting 2744 from 2909 leaves us with 165.
Grab the next digit (3) from the dividend, add it to 165, then carry on: 1653 / 392

Advancing to step 8:
392 goes into 1653 4 times with a remainder of 85.
Put 4 as the next digit of the answer. 
Result so far: 33474.0
The remainder is 85 after subtracting 1568 from 1653.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Moving on to step 9:
If we divide 850 by 392, we get 2 and a remainder of 66.
Put 2 as the next digit of the answer. 
Result so far: 33474.2
If we take 784 away from 850, we end up with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Going ahead to step 10:
The number 392 fits into 660 1 times, leaving a remainder of 268.
Put 1 as the next digit of the answer. 
Result so far: 33474.21
Subtract 392 from 660 to get 268.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

Going ahead to step 11:
392 goes into 2680 6 times with a remainder of 328.
The next digit of our result is 6. 
Result so far: 33474.216
If we take 2352 away from 2680, we end up with 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Step 12:
If we divide 3280 by 392, we get 8 and a remainder of 144.
Write down 8 as next digit of the result. 
Result so far: 33474.2168
Deduct 3136 from 3280 and we're left with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

On to step 13:
392 goes into 1440 3 times with a remainder of 264.
Put 3 as the next digit of the answer. 
Result so far: 33474.21683
Subtract 1176 from 1440 to get 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Let's proceed to step 14:
If we divide 2640 by 392, we get 6 and a remainder of 288.
Record the quotient 6 as the next digit in the result. 
Result so far: 33474.216836
If we take 2352 away from 2640, we end up with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

On to step 15:
The number 392 fits into 2880 7 times, leaving a remainder of 136.
Use 7 as the next digit of our solution. 
Result so far: 33474.2168367
If we subtract 2744 from 2880, we get 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Going ahead to step 16:
When dividing 1360 by 392, we get 3 with a remainder of 184.
The number 3 becomes the next digit in our result. 
Result so far: 33474.21683673
Subtract 1176 from 1360 to get 184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

The final result is 33474.21683673 with a remainder of 1.84e-07.