438150 divided by 77 
The aim is to understand the frequency of 77 in 438150.

On to step 1:
If we divide 4 by 77, we get 0 and a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 77

Advancing to step 2:
If we divide 43 by 77, we get 0 and a remainder of 43.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 43 to get 43.
Append the next digit (8) from the dividend to 43 and continue with: 438 / 77

Moving on to step 3:
438 divided by 77 is 5 with a remainder of 53.
Use 5 as the next digit of our solution. 
Result so far: 5.0
The remainder is 53 after subtracting 385 from 438.
Take the next digit (1) from the dividend and append it to 53, then repeat: 531 / 77

Advancing to step 4:
The number 77 fits into 531 6 times, leaving a remainder of 69.
Use 6 as the next digit of our solution. 
Result so far: 56.0
Subtract 462 from 531 to get 69.
Take the next digit (5) from the dividend and append it to 69, then repeat: 695 / 77

Step 5:
695 divided by 77 is 9 with a remainder of 2.
Record the quotient 9 as the next digit in the result. 
Result so far: 569.0
Subtract 693 from 695 to get 2.
Append the next digit (0) from the dividend to 2 and continue with: 20 / 77

Advancing to step 6:
The number 77 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 5690.0
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 7:
The number 77 fits into 200 2 times, leaving a remainder of 46.
The next digit of our result is 2. 
Result so far: 5690.2
Subtract 154 from 200 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 8:
460 divided by 77 is 5 with a remainder of 75.
Record the quotient 5 as the next digit in the result. 
Result so far: 5690.25
The remainder is 75 after subtracting 385 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

On to step 9:
77 can be fit into 750 9 times, resulting in a remainder of 57.
Write down 9 as next digit of the result. 
Result so far: 5690.259
If we take 693 away from 750, we end up with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Step 10:
When dividing 570 by 77, we get 7 with a remainder of 31.
Use 7 as the next digit of our solution. 
Result so far: 5690.2597
Subtract 539 from 570 to get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 11:
77 goes into 310 4 times with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 5690.25974
Deduct 308 from 310 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 12:
The number 77 fits into 20 0 times, leaving a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 5690.25974
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 13:
The number 77 fits into 200 2 times, leaving a remainder of 46.
Write down 2 as next digit of the result. 
Result so far: 5690.2597402
Subtract 154 from 200 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 14:
The number 77 fits into 460 5 times, leaving a remainder of 75.
Write down 5 as next digit of the result. 
Result so far: 5690.25974025
The remainder is 75 after subtracting 385 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

The final outcome is 5690.25974025, with a leftover of 7.5e-08.