We look at the division of 76217504 by 843 
The aim is to understand the frequency of 843 in 76217504.

Advancing to step 1:
When dividing 7 by 843, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Fetch the next digit (6) from the dividend, attach it to 7 and continue: 76 / 843

On to step 2:
76 divided by 843 is 0 with a remainder of 76.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 76 leaves us with 76.
Grab the next digit (2) from the dividend, add it to 76, then carry on: 762 / 843

Advancing to step 3:
If we divide 762 by 843, we get 0 and a remainder of 762.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 762 and we're left with 762.
Fetch the next digit (1) from the dividend, attach it to 762 and continue: 7621 / 843

Step 4:
When dividing 7621 by 843, we get 9 with a remainder of 34.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we take 7587 away from 7621, we end up with 34.
Fetch the next digit (7) from the dividend, attach it to 34 and continue: 347 / 843

Going ahead to step 5:
If we divide 347 by 843, we get 0 and a remainder of 347.
Record the quotient 0 as the next digit in the result. 
Result so far: 90.0
If we take 0 away from 347, we end up with 347.
Take the next digit (5) from the dividend and append it to 347, then repeat: 3475 / 843

Going ahead to step 6:
3475 divided by 843 is 4 with a remainder of 103.
Record the quotient 4 as the next digit in the result. 
Result so far: 904.0
The remainder is 103 after subtracting 3372 from 3475.
Fetch the next digit (0) from the dividend, attach it to 103 and continue: 1030 / 843

Moving on to step 7:
843 can be fit into 1030 1 times, resulting in a remainder of 187.
Use 1 as the next digit of our solution. 
Result so far: 9041.0
The remainder is 187 after subtracting 843 from 1030.
Include the next digit (4) from the dividend after 187, then repeat: 1874 / 843

On to step 8:
The number 843 fits into 1874 2 times, leaving a remainder of 188.
Use 2 as the next digit of our solution. 
Result so far: 90412.0
Subtract 1686 from 1874 to get 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

Moving on to step 9:
If we divide 1880 by 843, we get 2 and a remainder of 194.
The next digit of our result is 2. 
Result so far: 90412.2
Subtracting 1686 from 1880 leaves us with 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Advancing to step 10:
843 goes into 1940 2 times with a remainder of 254.
Record the quotient 2 as the next digit in the result. 
Result so far: 90412.22
Subtracting 1686 from 1940 leaves us with 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

The final outcome is 90412.22, with a leftover of 0.254.