77522025 ÷ 39 
The aim is to understand the frequency of 39 in 77522025.

Step 1:
The number 39 fits into 7 0 times, leaving a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 39

Advancing to step 2:
The number 39 fits into 77 1 times, leaving a remainder of 38.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 39 away from 77, we end up with 38.
Bring next digit (5) of the dividend behind the 38 and repeat the process: 385 / 39

Moving on to step 3:
385 divided by 39 is 9 with a remainder of 34.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
Subtracting 351 from 385 leaves us with 34.
Take the next digit (2) from the dividend and append it to 34, then repeat: 342 / 39

Step 4:
The number 39 fits into 342 8 times, leaving a remainder of 30.
Write down 8 as next digit of the result. 
Result so far: 198.0
The remainder is 30 after subtracting 312 from 342.
Bring next digit (2) of the dividend behind the 30 and repeat the process: 302 / 39

Step 5:
When dividing 302 by 39, we get 7 with a remainder of 29.
The number 7 becomes the next digit in our result. 
Result so far: 1987.0
If we take 273 away from 302, we end up with 29.
Fetch the next digit (0) from the dividend, attach it to 29 and continue: 290 / 39

Let's proceed to step 6:
39 goes into 290 7 times with a remainder of 17.
The number 7 becomes the next digit in our result. 
Result so far: 19877.0
If we subtract 273 from 290, we get 17.
Include the next digit (2) from the dividend after 17, then repeat: 172 / 39

Let's proceed to step 7:
The number 39 fits into 172 4 times, leaving a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 198774.0
Subtract 156 from 172 to get 16.
Include the next digit (5) from the dividend after 16, then repeat: 165 / 39

Going ahead to step 8:
39 goes into 165 4 times with a remainder of 9.
Use 4 as the next digit of our solution. 
Result so far: 1987744.0
The remainder is 9 after subtracting 156 from 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 9:
39 can be fit into 90 2 times, resulting in a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 1987744.2
Subtract 78 from 90 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.

Advancing to step 10:
120 divided by 39 is 3 with a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 1987744.23
If we take 117 away from 120, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 11:
When dividing 30 by 39, we get 0 with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 1987744.23
The remainder is 30 after subtracting 0 from 30.
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:
If we divide 300 by 39, we get 7 and a remainder of 27.
The next digit of our result is 7. 
Result so far: 1987744.2307
Subtract 273 from 300 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 13:
The number 39 fits into 270 6 times, leaving a remainder of 36.
The next digit of our result is 6. 
Result so far: 1987744.23076
Subtract 234 from 270 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 14:
If we divide 360 by 39, we get 9 and a remainder of 9.
Write down 9 as next digit of the result. 
Result so far: 1987744.230769
If we take 351 away from 360, we end up 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.

Let's proceed to step 15:
When dividing 90 by 39, we get 2 with a remainder of 12.
The next digit of our result is 2. 
Result so far: 1987744.2307692
Deduct 78 from 90 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 16:
39 goes into 120 3 times with a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 1987744.23076923
Deduct 117 from 120 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

The final outcome is 1987744.23076923, with a leftover of 3e-09.