We look at the division of 90407929 by 175 
The aim is to understand the frequency of 175 in 90407929.

Going ahead to step 1:
175 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 175

On to step 2:
If we divide 90 by 175, we get 0 and a remainder of 90.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 90, we end up with 90.
Append the next digit (4) from the dividend to 90 and continue with: 904 / 175

Going ahead to step 3:
904 divided by 175 is 5 with a remainder of 29.
The next digit of our result is 5. 
Result so far: 5.0
Deduct 875 from 904 and we're left with 29.
Include the next digit (0) from the dividend after 29, then repeat: 290 / 175

On to step 4:
175 can be fit into 290 1 times, resulting in a remainder of 115.
Put 1 as the next digit of the answer. 
Result so far: 51.0
If we subtract 175 from 290, we get 115.
Take the next digit (7) from the dividend and append it to 115, then repeat: 1157 / 175

Let's proceed to step 5:
175 goes into 1157 6 times with a remainder of 107.
Put 6 as the next digit of the answer. 
Result so far: 516.0
Deduct 1050 from 1157 and we're left with 107.
Grab the next digit (9) from the dividend, add it to 107, then carry on: 1079 / 175

Let's proceed to step 6:
If we divide 1079 by 175, we get 6 and a remainder of 29.
The next digit of our result is 6. 
Result so far: 5166.0
Deduct 1050 from 1079 and we're left with 29.
Include the next digit (2) from the dividend after 29, then repeat: 292 / 175

Going ahead to step 7:
175 can be fit into 292 1 times, resulting in a remainder of 117.
Record the quotient 1 as the next digit in the result. 
Result so far: 51661.0
Subtract 175 from 292 to get 117.
Include the next digit (9) from the dividend after 117, then repeat: 1179 / 175

Moving on to step 8:
175 goes into 1179 6 times with a remainder of 129.
Write down 6 as next digit of the result. 
Result so far: 516616.0
If we take 1050 away from 1179, we end up with 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

On to step 9:
When dividing 1290 by 175, we get 7 with a remainder of 65.
The number 7 becomes the next digit in our result. 
Result so far: 516616.7
Subtracting 1225 from 1290 leaves us with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Moving on to step 10:
The number 175 fits into 650 3 times, leaving a remainder of 125.
The next digit of our result is 3. 
Result so far: 516616.73
Subtract 525 from 650 to get 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Advancing to step 11:
When dividing 1250 by 175, we get 7 with a remainder of 25.
Put 7 as the next digit of the answer. 
Result so far: 516616.737
If we subtract 1225 from 1250, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 12:
175 can be fit into 250 1 times, resulting in a remainder of 75.
The next digit of our result is 1. 
Result so far: 516616.7371
Deduct 175 from 250 and we're left with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Moving on to step 13:
When dividing 750 by 175, we get 4 with a remainder of 50.
Use 4 as the next digit of our solution. 
Result so far: 516616.73714
The remainder is 50 after subtracting 700 from 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 14:
175 can be fit into 500 2 times, resulting in a remainder of 150.
The number 2 becomes the next digit in our result. 
Result so far: 516616.737142
If we subtract 350 from 500, we get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Let's proceed to step 15:
The number 175 fits into 1500 8 times, leaving a remainder of 100.
Record the quotient 8 as the next digit in the result. 
Result so far: 516616.7371428
If we take 1400 away from 1500, we end up with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 16:
When dividing 1000 by 175, we get 5 with a remainder of 125.
Put 5 as the next digit of the answer. 
Result so far: 516616.73714285
If we take 875 away from 1000, we end up with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

The final outcome is 516616.73714285, with a leftover of 1.25e-07.