We divide 581800 by 77
The aim is to understand the frequency of 77 in 581800.

Let's proceed to step 1:
77 can be fit into 5 0 times, resulting in a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 77

Step 2:
58 divided by 77 is 0 with a remainder of 58.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 58 and we're left with 58.
Grab the next digit (1) from the dividend, add it to 58, then carry on: 581 / 77

On to step 3:
581 divided by 77 is 7 with a remainder of 42.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Deduct 539 from 581 and we're left with 42.
Bring next digit (8) of the dividend behind the 42 and repeat the process: 428 / 77

Moving on to step 4:
77 goes into 428 5 times with a remainder of 43.
The next digit of our result is 5. 
Result so far: 75.0
Deduct 385 from 428 and we're left with 43.
Fetch the next digit (0) from the dividend, attach it to 43 and continue: 430 / 77

Moving on to step 5:
The number 77 fits into 430 5 times, leaving a remainder of 45.
The next digit of our result is 5. 
Result so far: 755.0
If we take 385 away from 430, we end up with 45.
Take the next digit (0) from the dividend and append it to 45, then repeat: 450 / 77

Let's proceed to step 6:
77 goes into 450 5 times with a remainder of 65.
Record the quotient 5 as the next digit in the result. 
Result so far: 7555.0
Subtract 385 from 450 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Going ahead to step 7:
650 divided by 77 is 8 with a remainder of 34.
The next digit of our result is 8. 
Result so far: 7555.8
Subtracting 616 from 650 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 8:
When dividing 340 by 77, we get 4 with a remainder of 32.
Record the quotient 4 as the next digit in the result. 
Result so far: 7555.84
Subtract 308 from 340 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 9:
77 goes into 320 4 times with a remainder of 12.
Use 4 as the next digit of our solution. 
Result so far: 7555.844
Subtract 308 from 320 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.

After the division, we end up with 7555.844 and a remainder of 0.0012.