We're dividing 172399 by 70 
The aim is to understand the frequency of 70 in 172399.

On to step 1:
70 can be fit into 1 0 times, resulting in a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 70

Advancing to step 2:
70 goes into 17 0 times with a remainder of 17.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 17 and we're left with 17.
Bring next digit (2) of the dividend behind the 17 and repeat the process: 172 / 70

Going ahead to step 3:
70 goes into 172 2 times with a remainder of 32.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 140 from 172 leaves us with 32.
Grab the next digit (3) from the dividend, add it to 32, then carry on: 323 / 70

Advancing to step 4:
323 divided by 70 is 4 with a remainder of 43.
Use 4 as the next digit of our solution. 
Result so far: 24.0
Subtract 280 from 323 to get 43.
Bring next digit (9) of the dividend behind the 43 and repeat the process: 439 / 70

Let's proceed to step 5:
70 goes into 439 6 times with a remainder of 19.
The next digit of our result is 6. 
Result so far: 246.0
Deduct 420 from 439 and we're left with 19.
Append the next digit (9) from the dividend to 19 and continue with: 199 / 70

Moving on to step 6:
199 divided by 70 is 2 with a remainder of 59.
Put 2 as the next digit of the answer. 
Result so far: 2462.0
Deduct 140 from 199 and we're left with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Advancing to step 7:
If we divide 590 by 70, we get 8 and a remainder of 30.
Write down 8 as next digit of the result. 
Result so far: 2462.8
Deduct 560 from 590 and we're left 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.

On to step 8:
If we divide 300 by 70, we get 4 and a remainder of 20.
Write down 4 as next digit of the result. 
Result so far: 2462.84
Subtracting 280 from 300 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 9:
70 can be fit into 200 2 times, resulting in a remainder of 60.
Use 2 as the next digit of our solution. 
Result so far: 2462.842
Subtract 140 from 200 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 10:
If we divide 600 by 70, we get 8 and a remainder of 40.
The number 8 becomes the next digit in our result. 
Result so far: 2462.8428
The remainder is 40 after subtracting 560 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 11:
The number 70 fits into 400 5 times, leaving a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 2462.84285
If we take 350 away from 400, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 12:
The number 70 fits into 500 7 times, leaving a remainder of 10.
The next digit of our result is 7. 
Result so far: 2462.842857
Subtracting 490 from 500 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 13:
70 goes into 100 1 times with a remainder of 30.
Use 1 as the next digit of our solution. 
Result so far: 2462.8428571
The remainder is 30 after subtracting 70 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 14:
The number 70 fits into 300 4 times, leaving a remainder of 20.
Record the quotient 4 as the next digit in the result. 
Result so far: 2462.84285714
Deduct 280 from 300 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final result is 2462.84285714 with a remainder of 2e-08.