We look at the division of 73940980 by 905 
The aim is to understand the frequency of 905 in 73940980.

On to step 1:
If we divide 7 by 905, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (3) from the dividend, add it to 7, then carry on: 73 / 905

Step 2:
The number 905 fits into 73 0 times, leaving a remainder of 73.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 73 and we're left with 73.
Bring next digit (9) of the dividend behind the 73 and repeat the process: 739 / 905

Advancing to step 3:
When dividing 739 by 905, we get 0 with a remainder of 739.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 739 and we're left with 739.
Bring next digit (4) of the dividend behind the 739 and repeat the process: 7394 / 905

Advancing to step 4:
905 can be fit into 7394 8 times, resulting in a remainder of 154.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we subtract 7240 from 7394, we get 154.
Grab the next digit (0) from the dividend, add it to 154, then carry on: 1540 / 905

On to step 5:
When dividing 1540 by 905, we get 1 with a remainder of 635.
Write down 1 as next digit of the result. 
Result so far: 81.0
The remainder is 635 after subtracting 905 from 1540.
Take the next digit (9) from the dividend and append it to 635, then repeat: 6359 / 905

On to step 6:
905 can be fit into 6359 7 times, resulting in a remainder of 24.
Put 7 as the next digit of the answer. 
Result so far: 817.0
If we take 6335 away from 6359, we end up with 24.
Append the next digit (8) from the dividend to 24 and continue with: 248 / 905

Moving on to step 7:
248 divided by 905 is 0 with a remainder of 248.
Record the quotient 0 as the next digit in the result. 
Result so far: 8170.0
The remainder is 248 after subtracting 0 from 248.
Append the next digit (0) from the dividend to 248 and continue with: 2480 / 905

On to step 8:
905 can be fit into 2480 2 times, resulting in a remainder of 670.
Write down 2 as next digit of the result. 
Result so far: 81702.0
Subtracting 1810 from 2480 leaves us with 670.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6700, and continue the process.

Advancing to step 9:
905 can be fit into 6700 7 times, resulting in a remainder of 365.
The next digit of our result is 7. 
Result so far: 81702.7
If we subtract 6335 from 6700, we get 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Let's proceed to step 10:
905 can be fit into 3650 4 times, resulting in a remainder of 30.
Use 4 as the next digit of our solution. 
Result so far: 81702.74
Subtracting 3620 from 3650 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 11:
When dividing 300 by 905, we get 0 with a remainder of 300.
Record the quotient 0 as the next digit in the result. 
Result so far: 81702.74
If we subtract 0 from 300, we get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Step 12:
905 can be fit into 3000 3 times, resulting in a remainder of 285.
Put 3 as the next digit of the answer. 
Result so far: 81702.7403
Deduct 2715 from 3000 and we're left with 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

Let's proceed to step 13:
When dividing 2850 by 905, we get 3 with a remainder of 135.
The next digit of our result is 3. 
Result so far: 81702.74033
If we take 2715 away from 2850, we end up with 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

After the division, we end up with 81702.74033 and a remainder of 0.000135.