7912349 ÷ 170 
The aim is to understand the frequency of 170 in 7912349.

Step 1:
7 divided by 170 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 170

Step 2:
The number 170 fits into 79 0 times, leaving a remainder of 79.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 79 to get 79.
Fetch the next digit (1) from the dividend, attach it to 79 and continue: 791 / 170

Going ahead to step 3:
170 can be fit into 791 4 times, resulting in a remainder of 111.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 680 from 791 leaves us with 111.
Take the next digit (2) from the dividend and append it to 111, then repeat: 1112 / 170

Going ahead to step 4:
The number 170 fits into 1112 6 times, leaving a remainder of 92.
Put 6 as the next digit of the answer. 
Result so far: 46.0
Subtracting 1020 from 1112 leaves us with 92.
Bring next digit (3) of the dividend behind the 92 and repeat the process: 923 / 170

Step 5:
170 can be fit into 923 5 times, resulting in a remainder of 73.
Record the quotient 5 as the next digit in the result. 
Result so far: 465.0
If we take 850 away from 923, we end up with 73.
Bring next digit (4) of the dividend behind the 73 and repeat the process: 734 / 170

Moving on to step 6:
170 goes into 734 4 times with a remainder of 54.
The next digit of our result is 4. 
Result so far: 4654.0
Deduct 680 from 734 and we're left with 54.
Fetch the next digit (9) from the dividend, attach it to 54 and continue: 549 / 170

Step 7:
549 divided by 170 is 3 with a remainder of 39.
Use 3 as the next digit of our solution. 
Result so far: 46543.0
If we take 510 away from 549, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 8:
170 goes into 390 2 times with a remainder of 50.
Write down 2 as next digit of the result. 
Result so far: 46543.2
Deduct 340 from 390 and we're left 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.

Advancing to step 9:
500 divided by 170 is 2 with a remainder of 160.
The number 2 becomes the next digit in our result. 
Result so far: 46543.22
If we take 340 away from 500, we end up with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

The final result is 46543.22 with a remainder of 0.16.