We look at the division of 18153406 by 777 
The aim is to understand the frequency of 777 in 18153406.

On to step 1:
The number 777 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 777

On to step 2:
When dividing 18 by 777, we get 0 with a remainder of 18.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 18, we end up with 18.
Take the next digit (1) from the dividend and append it to 18, then repeat: 181 / 777

Step 3:
If we divide 181 by 777, we get 0 and a remainder of 181.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 181, we end up with 181.
Fetch the next digit (5) from the dividend, attach it to 181 and continue: 1815 / 777

Moving on to step 4:
If we divide 1815 by 777, we get 2 and a remainder of 261.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 1554 from 1815, we get 261.
Fetch the next digit (3) from the dividend, attach it to 261 and continue: 2613 / 777

Advancing to step 5:
The number 777 fits into 2613 3 times, leaving a remainder of 282.
Write down 3 as next digit of the result. 
Result so far: 23.0
Subtract 2331 from 2613 to get 282.
Include the next digit (4) from the dividend after 282, then repeat: 2824 / 777

Moving on to step 6:
If we divide 2824 by 777, we get 3 and a remainder of 493.
Use 3 as the next digit of our solution. 
Result so far: 233.0
If we subtract 2331 from 2824, we get 493.
Take the next digit (0) from the dividend and append it to 493, then repeat: 4930 / 777

Moving on to step 7:
777 goes into 4930 6 times with a remainder of 268.
Record the quotient 6 as the next digit in the result. 
Result so far: 2336.0
Subtract 4662 from 4930 to get 268.
Include the next digit (6) from the dividend after 268, then repeat: 2686 / 777

Step 8:
When dividing 2686 by 777, we get 3 with a remainder of 355.
Put 3 as the next digit of the answer. 
Result so far: 23363.0
If we take 2331 away from 2686, we end up with 355.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3550, and continue the process.

On to step 9:
777 can be fit into 3550 4 times, resulting in a remainder of 442.
The number 4 becomes the next digit in our result. 
Result so far: 23363.4
Deduct 3108 from 3550 and we're left with 442.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

Going ahead to step 10:
If we divide 4420 by 777, we get 5 and a remainder of 535.
The number 5 becomes the next digit in our result. 
Result so far: 23363.45
Subtract 3885 from 4420 to get 535.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5350, and continue the process.

Moving on to step 11:
777 can be fit into 5350 6 times, resulting in a remainder of 688.
The next digit of our result is 6. 
Result so far: 23363.456
If we take 4662 away from 5350, we end up with 688.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6880, and continue the process.

Going ahead to step 12:
The number 777 fits into 6880 8 times, leaving a remainder of 664.
Put 8 as the next digit of the answer. 
Result so far: 23363.4568
Subtract 6216 from 6880 to get 664.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6640, and continue the process.

On to step 13:
The number 777 fits into 6640 8 times, leaving a remainder of 424.
The number 8 becomes the next digit in our result. 
Result so far: 23363.45688
If we take 6216 away from 6640, we end up with 424.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

The final result is 23363.45688 with a remainder of 0.000424.