571149 ÷ 77 
The aim is to understand the frequency of 77 in 571149.

Let's proceed to step 1:
When dividing 5 by 77, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 77

On to step 2:
When dividing 57 by 77, we get 0 with a remainder of 57.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 57, we end up with 57.
Fetch the next digit (1) from the dividend, attach it to 57 and continue: 571 / 77

Moving on to step 3:
If we divide 571 by 77, we get 7 and a remainder of 32.
The next digit of our result is 7. 
Result so far: 7.0
Deduct 539 from 571 and we're left with 32.
Append the next digit (1) from the dividend to 32 and continue with: 321 / 77

Advancing to step 4:
The number 77 fits into 321 4 times, leaving a remainder of 13.
The next digit of our result is 4. 
Result so far: 74.0
If we subtract 308 from 321, we get 13.
Grab the next digit (4) from the dividend, add it to 13, then carry on: 134 / 77

Let's proceed to step 5:
77 goes into 134 1 times with a remainder of 57.
Record the quotient 1 as the next digit in the result. 
Result so far: 741.0
The remainder is 57 after subtracting 77 from 134.
Fetch the next digit (9) from the dividend, attach it to 57 and continue: 579 / 77

Step 6:
77 can be fit into 579 7 times, resulting in a remainder of 40.
Write down 7 as next digit of the result. 
Result so far: 7417.0
If we subtract 539 from 579, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 7:
400 divided by 77 is 5 with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 7417.5
Deduct 385 from 400 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 8:
When dividing 150 by 77, we get 1 with a remainder of 73.
The number 1 becomes the next digit in our result. 
Result so far: 7417.51
The remainder is 73 after subtracting 77 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Moving on to step 9:
77 can be fit into 730 9 times, resulting in a remainder of 37.
Use 9 as the next digit of our solution. 
Result so far: 7417.519
If we take 693 away from 730, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 10:
If we divide 370 by 77, we get 4 and a remainder of 62.
Write down 4 as next digit of the result. 
Result so far: 7417.5194
Deduct 308 from 370 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 11:
77 can be fit into 620 8 times, resulting in a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 7417.51948
Deduct 616 from 620 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 12:
If we divide 40 by 77, we get 0 and a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 7417.51948
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 13:
When dividing 400 by 77, we get 5 with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 7417.5194805
Deduct 385 from 400 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 14:
When dividing 150 by 77, we get 1 with a remainder of 73.
Use 1 as the next digit of our solution. 
Result so far: 7417.51948051
Subtract 77 from 150 to get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

The final outcome is 7417.51948051, with a leftover of 7.3e-08.