45678718 ÷ 905 
The aim is to understand the frequency of 905 in 45678718.

Step 1:
905 goes into 4 0 times with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 905

Going ahead to step 2:
When dividing 45 by 905, we get 0 with a remainder of 45.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 45, we get 45.
Grab the next digit (6) from the dividend, add it to 45, then carry on: 456 / 905

Step 3:
456 divided by 905 is 0 with a remainder of 456.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 456 after subtracting 0 from 456.
Bring next digit (7) of the dividend behind the 456 and repeat the process: 4567 / 905

On to step 4:
The number 905 fits into 4567 5 times, leaving a remainder of 42.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Subtracting 4525 from 4567 leaves us with 42.
Fetch the next digit (8) from the dividend, attach it to 42 and continue: 428 / 905

Let's proceed to step 5:
When dividing 428 by 905, we get 0 with a remainder of 428.
Use 0 as the next digit of our solution. 
Result so far: 50.0
If we take 0 away from 428, we end up with 428.
Fetch the next digit (7) from the dividend, attach it to 428 and continue: 4287 / 905

Advancing to step 6:
If we divide 4287 by 905, we get 4 and a remainder of 667.
The number 4 becomes the next digit in our result. 
Result so far: 504.0
Subtract 3620 from 4287 to get 667.
Fetch the next digit (1) from the dividend, attach it to 667 and continue: 6671 / 905

Advancing to step 7:
When dividing 6671 by 905, we get 7 with a remainder of 336.
The next digit of our result is 7. 
Result so far: 5047.0
Subtract 6335 from 6671 to get 336.
Bring next digit (8) of the dividend behind the 336 and repeat the process: 3368 / 905

Going ahead to step 8:
905 can be fit into 3368 3 times, resulting in a remainder of 653.
Record the quotient 3 as the next digit in the result. 
Result so far: 50473.0
The remainder is 653 after subtracting 2715 from 3368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6530, and continue the process.

Step 9:
905 goes into 6530 7 times with a remainder of 195.
Use 7 as the next digit of our solution. 
Result so far: 50473.7
If we subtract 6335 from 6530, we get 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Step 10:
1950 divided by 905 is 2 with a remainder of 140.
The number 2 becomes the next digit in our result. 
Result so far: 50473.72
The remainder is 140 after subtracting 1810 from 1950.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Moving on to step 11:
When dividing 1400 by 905, we get 1 with a remainder of 495.
The next digit of our result is 1. 
Result so far: 50473.721
Deduct 905 from 1400 and we're left with 495.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4950, and continue the process.

Moving on to step 12:
905 goes into 4950 5 times with a remainder of 425.
Write down 5 as next digit of the result. 
Result so far: 50473.7215
The remainder is 425 after subtracting 4525 from 4950.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

Going ahead to step 13:
The number 905 fits into 4250 4 times, leaving a remainder of 630.
Record the quotient 4 as the next digit in the result. 
Result so far: 50473.72154
If we take 3620 away from 4250, we end up with 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

Going ahead to step 14:
When dividing 6300 by 905, we get 6 with a remainder of 870.
The number 6 becomes the next digit in our result. 
Result so far: 50473.721546
Subtract 5430 from 6300 to get 870.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8700, and continue the process.

Step 15:
8700 divided by 905 is 9 with a remainder of 555.
Record the quotient 9 as the next digit in the result. 
Result so far: 50473.7215469
If we take 8145 away from 8700, we end up with 555.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5550, and continue the process.

Going ahead to step 16:
If we divide 5550 by 905, we get 6 and a remainder of 120.
The next digit of our result is 6. 
Result so far: 50473.72154696
If we take 5430 away from 5550, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

The final outcome is 50473.72154696, with a leftover of 1.2e-07.