12388121 ÷ 769 
The aim is to understand the frequency of 769 in 12388121.

Let's proceed to step 1:
If we divide 1 by 769, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 769

Step 2:
The number 769 fits into 12 0 times, leaving a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Include the next digit (3) from the dividend after 12, then repeat: 123 / 769

Step 3:
769 can be fit into 123 0 times, resulting in a remainder of 123.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 123 and we're left with 123.
Include the next digit (8) from the dividend after 123, then repeat: 1238 / 769

Let's proceed to step 4:
When dividing 1238 by 769, we get 1 with a remainder of 469.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 769 from 1238, we get 469.
Include the next digit (8) from the dividend after 469, then repeat: 4698 / 769

Step 5:
If we divide 4698 by 769, we get 6 and a remainder of 84.
Use 6 as the next digit of our solution. 
Result so far: 16.0
If we subtract 4614 from 4698, we get 84.
Bring next digit (1) of the dividend behind the 84 and repeat the process: 841 / 769

Step 6:
841 divided by 769 is 1 with a remainder of 72.
Put 1 as the next digit of the answer. 
Result so far: 161.0
Subtract 769 from 841 to get 72.
Fetch the next digit (2) from the dividend, attach it to 72 and continue: 722 / 769

Moving on to step 7:
722 divided by 769 is 0 with a remainder of 722.
The next digit of our result is 0. 
Result so far: 1610.0
The remainder is 722 after subtracting 0 from 722.
Append the next digit (1) from the dividend to 722 and continue with: 7221 / 769

Step 8:
If we divide 7221 by 769, we get 9 and a remainder of 300.
Use 9 as the next digit of our solution. 
Result so far: 16109.0
Subtracting 6921 from 7221 leaves us with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Step 9:
769 can be fit into 3000 3 times, resulting in a remainder of 693.
Put 3 as the next digit of the answer. 
Result so far: 16109.3
Deduct 2307 from 3000 and we're left with 693.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6930, and continue the process.

Step 10:
When dividing 6930 by 769, we get 9 with a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 16109.39
Subtracting 6921 from 6930 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 11:
769 can be fit into 90 0 times, resulting in a remainder of 90.
The number 0 becomes the next digit in our result. 
Result so far: 16109.39
Subtracting 0 from 90 leaves us 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 12:
769 goes into 900 1 times with a remainder of 131.
The next digit of our result is 1. 
Result so far: 16109.3901
Subtracting 769 from 900 leaves us with 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

Going ahead to step 13:
1310 divided by 769 is 1 with a remainder of 541.
Record the quotient 1 as the next digit in the result. 
Result so far: 16109.39011
The remainder is 541 after subtracting 769 from 1310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5410, and continue the process.

The final result is 16109.39011 with a remainder of 0.000541.