90707699 ÷ 173 
The aim is to understand the frequency of 173 in 90707699.

Advancing to step 1:
173 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 173

Step 2:
The number 173 fits into 90 0 times, leaving a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 90, we get 90.
Append the next digit (7) from the dividend to 90 and continue with: 907 / 173

Moving on to step 3:
173 goes into 907 5 times with a remainder of 42.
Write down 5 as next digit of the result. 
Result so far: 5.0
The remainder is 42 after subtracting 865 from 907.
Take the next digit (0) from the dividend and append it to 42, then repeat: 420 / 173

Going ahead to step 4:
173 goes into 420 2 times with a remainder of 74.
Use 2 as the next digit of our solution. 
Result so far: 52.0
If we subtract 346 from 420, we get 74.
Take the next digit (7) from the dividend and append it to 74, then repeat: 747 / 173

Advancing to step 5:
173 can be fit into 747 4 times, resulting in a remainder of 55.
The next digit of our result is 4. 
Result so far: 524.0
Subtracting 692 from 747 leaves us with 55.
Take the next digit (6) from the dividend and append it to 55, then repeat: 556 / 173

Advancing to step 6:
If we divide 556 by 173, we get 3 and a remainder of 37.
The number 3 becomes the next digit in our result. 
Result so far: 5243.0
If we subtract 519 from 556, we get 37.
Bring next digit (9) of the dividend behind the 37 and repeat the process: 379 / 173

On to step 7:
When dividing 379 by 173, we get 2 with a remainder of 33.
The next digit of our result is 2. 
Result so far: 52432.0
If we subtract 346 from 379, we get 33.
Append the next digit (9) from the dividend to 33 and continue with: 339 / 173

Step 8:
When dividing 339 by 173, we get 1 with a remainder of 166.
Record the quotient 1 as the next digit in the result. 
Result so far: 524321.0
The remainder is 166 after subtracting 173 from 339.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Advancing to step 9:
The number 173 fits into 1660 9 times, leaving a remainder of 103.
The number 9 becomes the next digit in our result. 
Result so far: 524321.9
Subtracting 1557 from 1660 leaves us with 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

Moving on to step 10:
173 can be fit into 1030 5 times, resulting in a remainder of 165.
The number 5 becomes the next digit in our result. 
Result so far: 524321.95
If we take 865 away from 1030, we end up with 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Let's proceed to step 11:
1650 divided by 173 is 9 with a remainder of 93.
Record the quotient 9 as the next digit in the result. 
Result so far: 524321.959
The remainder is 93 after subtracting 1557 from 1650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Let's proceed to step 12:
930 divided by 173 is 5 with a remainder of 65.
Use 5 as the next digit of our solution. 
Result so far: 524321.9595
Subtract 865 from 930 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Advancing to step 13:
The number 173 fits into 650 3 times, leaving a remainder of 131.
The next digit of our result is 3. 
Result so far: 524321.95953
The remainder is 131 after subtracting 519 from 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

On to step 14:
The number 173 fits into 1310 7 times, leaving a remainder of 99.
Put 7 as the next digit of the answer. 
Result so far: 524321.959537
If we take 1211 away from 1310, we end up with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Step 15:
173 can be fit into 990 5 times, resulting in a remainder of 125.
The next digit of our result is 5. 
Result so far: 524321.9595375
Subtracting 865 from 990 leaves us 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.

Step 16:
1250 divided by 173 is 7 with a remainder of 39.
The next digit of our result is 7. 
Result so far: 524321.95953757
The remainder is 39 after subtracting 1211 from 1250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

The final outcome is 524321.95953757, with a leftover of 3.9e-08.