We're dividing 66931406 by 904 
The aim is to understand the frequency of 904 in 66931406.

Step 1:
904 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 904

Step 2:
If we divide 66 by 904, we get 0 and a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Fetch the next digit (9) from the dividend, attach it to 66 and continue: 669 / 904

Step 3:
The number 904 fits into 669 0 times, leaving a remainder of 669.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 669 after subtracting 0 from 669.
Fetch the next digit (3) from the dividend, attach it to 669 and continue: 6693 / 904

Step 4:
904 can be fit into 6693 7 times, resulting in a remainder of 365.
The next digit of our result is 7. 
Result so far: 7.0
If we take 6328 away from 6693, we end up with 365.
Take the next digit (1) from the dividend and append it to 365, then repeat: 3651 / 904

Going ahead to step 5:
If we divide 3651 by 904, we get 4 and a remainder of 35.
Use 4 as the next digit of our solution. 
Result so far: 74.0
The remainder is 35 after subtracting 3616 from 3651.
Bring next digit (4) of the dividend behind the 35 and repeat the process: 354 / 904

Moving on to step 6:
The number 904 fits into 354 0 times, leaving a remainder of 354.
The next digit of our result is 0. 
Result so far: 740.0
Deduct 0 from 354 and we're left with 354.
Take the next digit (0) from the dividend and append it to 354, then repeat: 3540 / 904

Moving on to step 7:
904 goes into 3540 3 times with a remainder of 828.
The next digit of our result is 3. 
Result so far: 7403.0
The remainder is 828 after subtracting 2712 from 3540.
Include the next digit (6) from the dividend after 828, then repeat: 8286 / 904

On to step 8:
The number 904 fits into 8286 9 times, leaving a remainder of 150.
Write down 9 as next digit of the result. 
Result so far: 74039.0
The remainder is 150 after subtracting 8136 from 8286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 9:
904 can be fit into 1500 1 times, resulting in a remainder of 596.
Write down 1 as next digit of the result. 
Result so far: 74039.1
If we subtract 904 from 1500, we get 596.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5960, and continue the process.

Advancing to step 10:
If we divide 5960 by 904, we get 6 and a remainder of 536.
The next digit of our result is 6. 
Result so far: 74039.16
If we subtract 5424 from 5960, we get 536.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5360, and continue the process.

Step 11:
5360 divided by 904 is 5 with a remainder of 840.
Record the quotient 5 as the next digit in the result. 
Result so far: 74039.165
The remainder is 840 after subtracting 4520 from 5360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8400, and continue the process.

On to step 12:
When dividing 8400 by 904, we get 9 with a remainder of 264.
Write down 9 as next digit of the result. 
Result so far: 74039.1659
If we subtract 8136 from 8400, we get 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Let's proceed to step 13:
The number 904 fits into 2640 2 times, leaving a remainder of 832.
The number 2 becomes the next digit in our result. 
Result so far: 74039.16592
If we subtract 1808 from 2640, we get 832.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8320, and continue the process.

Let's proceed to step 14:
When dividing 8320 by 904, we get 9 with a remainder of 184.
Record the quotient 9 as the next digit in the result. 
Result so far: 74039.165929
Deduct 8136 from 8320 and we're left with 184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

Let's proceed to step 15:
If we divide 1840 by 904, we get 2 and a remainder of 32.
The number 2 becomes the next digit in our result. 
Result so far: 74039.1659292
Subtracting 1808 from 1840 leaves us with 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 16:
904 goes into 320 0 times with a remainder of 320.
Record the quotient 0 as the next digit in the result. 
Result so far: 74039.1659292
Subtract 0 from 320 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

After the division, we end up with 74039.1659292 and a remainder of 3.2e-07.