320250 ÷ 77 
The aim is to understand the frequency of 77 in 320250.

Step 1:
77 can be fit into 3 0 times, resulting in a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Grab the next digit (2) from the dividend, add it to 3, then carry on: 32 / 77

Step 2:
If we divide 32 by 77, we get 0 and a remainder of 32.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 32, we get 32.
Append the next digit (0) from the dividend to 32 and continue with: 320 / 77

Let's proceed to step 3:
When dividing 320 by 77, we get 4 with a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 308 from 320 and we're left with 12.
Bring next digit (2) of the dividend behind the 12 and repeat the process: 122 / 77

Step 4:
When dividing 122 by 77, we get 1 with a remainder of 45.
Use 1 as the next digit of our solution. 
Result so far: 41.0
Deduct 77 from 122 and we're left with 45.
Include the next digit (5) from the dividend after 45, then repeat: 455 / 77

Let's proceed to step 5:
77 can be fit into 455 5 times, resulting in a remainder of 70.
Use 5 as the next digit of our solution. 
Result so far: 415.0
Subtract 385 from 455 to get 70.
Take the next digit (0) from the dividend and append it to 70, then repeat: 700 / 77

On to step 6:
If we divide 700 by 77, we get 9 and a remainder of 7.
Use 9 as the next digit of our solution. 
Result so far: 4159.0
If we subtract 693 from 700, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
When dividing 70 by 77, we get 0 with a remainder of 70.
Use 0 as the next digit of our solution. 
Result so far: 4159.0
Deduct 0 from 70 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 8:
77 can be fit into 700 9 times, resulting in a remainder of 7.
Use 9 as the next digit of our solution. 
Result so far: 4159.09
If we subtract 693 from 700, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 9:
The number 77 fits into 70 0 times, leaving a remainder of 70.
Use 0 as the next digit of our solution. 
Result so far: 4159.09
If we take 0 away from 70, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 10:
700 divided by 77 is 9 with a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 4159.0909
Subtract 693 from 700 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 11:
70 divided by 77 is 0 with a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 4159.0909
The remainder is 70 after subtracting 0 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 12:
77 can be fit into 700 9 times, resulting in a remainder of 7.
Write down 9 as next digit of the result. 
Result so far: 4159.090909
Subtract 693 from 700 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 13:
The number 77 fits into 70 0 times, leaving a remainder of 70.
The next digit of our result is 0. 
Result so far: 4159.090909
If we take 0 away from 70, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 14:
When dividing 700 by 77, we get 9 with a remainder of 7.
Use 9 as the next digit of our solution. 
Result so far: 4159.09090909
If we take 693 away from 700, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

The final result is 4159.09090909 with a remainder of 7e-09.