We divide 78909918 by 673
The aim is to understand the frequency of 673 in 78909918.

Advancing to step 1:
The number 673 fits into 7 0 times, leaving a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 673

Moving on to step 2:
If we divide 78 by 673, we get 0 and a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Bring next digit (9) of the dividend behind the 78 and repeat the process: 789 / 673

Moving on to step 3:
If we divide 789 by 673, we get 1 and a remainder of 116.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 673 from 789 to get 116.
Fetch the next digit (0) from the dividend, attach it to 116 and continue: 1160 / 673

Step 4:
If we divide 1160 by 673, we get 1 and a remainder of 487.
Put 1 as the next digit of the answer. 
Result so far: 11.0
If we take 673 away from 1160, we end up with 487.
Fetch the next digit (9) from the dividend, attach it to 487 and continue: 4879 / 673

On to step 5:
If we divide 4879 by 673, we get 7 and a remainder of 168.
Record the quotient 7 as the next digit in the result. 
Result so far: 117.0
Subtracting 4711 from 4879 leaves us with 168.
Bring next digit (9) of the dividend behind the 168 and repeat the process: 1689 / 673

Advancing to step 6:
673 can be fit into 1689 2 times, resulting in a remainder of 343.
The number 2 becomes the next digit in our result. 
Result so far: 1172.0
Subtract 1346 from 1689 to get 343.
Include the next digit (1) from the dividend after 343, then repeat: 3431 / 673

Advancing to step 7:
If we divide 3431 by 673, we get 5 and a remainder of 66.
Put 5 as the next digit of the answer. 
Result so far: 11725.0
Subtract 3365 from 3431 to get 66.
Take the next digit (8) from the dividend and append it to 66, then repeat: 668 / 673

Moving on to step 8:
673 goes into 668 0 times with a remainder of 668.
Record the quotient 0 as the next digit in the result. 
Result so far: 117250.0
Subtracting 0 from 668 leaves us with 668.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6680, and continue the process.

Going ahead to step 9:
673 can be fit into 6680 9 times, resulting in a remainder of 623.
Write down 9 as next digit of the result. 
Result so far: 117250.9
Subtracting 6057 from 6680 leaves us with 623.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6230, and continue the process.

Moving on to step 10:
If we divide 6230 by 673, we get 9 and a remainder of 173.
Write down 9 as next digit of the result. 
Result so far: 117250.99
Subtract 6057 from 6230 to get 173.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1730, and continue the process.

After the division, we end up with 117250.99 and a remainder of 0.173.