We look at the division of 8451218 by 774 
The aim is to understand the frequency of 774 in 8451218.

Step 1:
When dividing 8 by 774, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 774

Advancing to step 2:
84 divided by 774 is 0 with a remainder of 84.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 84 leaves us with 84.
Append the next digit (5) from the dividend to 84 and continue with: 845 / 774

Let's proceed to step 3:
If we divide 845 by 774, we get 1 and a remainder of 71.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 774 away from 845, we end up with 71.
Append the next digit (1) from the dividend to 71 and continue with: 711 / 774

Step 4:
If we divide 711 by 774, we get 0 and a remainder of 711.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
The remainder is 711 after subtracting 0 from 711.
Fetch the next digit (2) from the dividend, attach it to 711 and continue: 7112 / 774

Advancing to step 5:
774 goes into 7112 9 times with a remainder of 146.
The next digit of our result is 9. 
Result so far: 109.0
Deduct 6966 from 7112 and we're left with 146.
Include the next digit (1) from the dividend after 146, then repeat: 1461 / 774

Let's proceed to step 6:
774 can be fit into 1461 1 times, resulting in a remainder of 687.
Record the quotient 1 as the next digit in the result. 
Result so far: 1091.0
The remainder is 687 after subtracting 774 from 1461.
Take the next digit (8) from the dividend and append it to 687, then repeat: 6878 / 774

On to step 7:
774 can be fit into 6878 8 times, resulting in a remainder of 686.
The number 8 becomes the next digit in our result. 
Result so far: 10918.0
Subtracting 6192 from 6878 leaves us with 686.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6860, and continue the process.

Advancing to step 8:
6860 divided by 774 is 8 with a remainder of 668.
The next digit of our result is 8. 
Result so far: 10918.8
Deduct 6192 from 6860 and we're left with 668.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6680, and continue the process.

Moving on to step 9:
If we divide 6680 by 774, we get 8 and a remainder of 488.
Put 8 as the next digit of the answer. 
Result so far: 10918.88
The remainder is 488 after subtracting 6192 from 6680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

After the division, we end up with 10918.88 and a remainder of 0.488.