The first line graph illustrates the ownership of electrical appliances such as washing machine, refrigerator, vacuum cleaner and the second line graph shows the number of hours of housework per week per household from 1920 to 2019.
Using refrigerator and vacuum cleaner have been rose Steadily in the year of 1920 to 2000 which cause people spend fewer time for doing housework.
Just in case of cleaning, vacuum cleaner helps people Clean their house easily and faster than before.
Also refrigerator cause that preservation The food fresh Besides prevent spoiled food, fruits and meat. so when you want prepare meals, you can use half-ready food stuff that you keep in your refrigerator.
Based on graph, using washing machine has been completely fluctuated.
Since ownership of electrical appliances become increasing, people do their housework in short time. 
The  
first
 line graph illustrates the ownership of electrical appliances such as washing machine, refrigerator, vacuum cleaner and the second line graph  
shows
 the number of hours of housework per week per household from 1920 to 2019.
Using refrigerator and vacuum cleaner have been rose  
Steadily
 in the year of 1920 to 2000 which cause  
people
 spend fewer time for doing housework. 
Just
 in case of cleaning, vacuum cleaner  
helps
  people
 Clean their  
house
  easily
 and faster than  
before
. 
Also
 refrigerator cause that preservation The food fresh  
Besides
  prevent
 spoiled food, fruits and meat.  
so
 when you  
want prepare
 meals, you can  
use
 half-ready food stuff that you  
keep
 in your refrigerator.
Based on graph, using washing machine has been completely fluctuated.
Since ownership of electrical appliances become increasing,  
people
 do their housework in short time.